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cy7c1355c, cy7c1357c 9-mbit (256 k 36 / 5 12 k 18) flow-through sram with nobl? architecture cypress semiconductor corporation ? 198 champion court ? san jose , ca 95134-1709 ? 408-943-2600 document number: 38-05539 rev. *h revised april 1, 2011 9-mbit (256 k 36 / 512 k 18) flow-through sram with nobl? architecture features no bus latency? (nobl?) arch itecture eliminates dead cycles between write and read cycles can support up to 133-mhz bus operations with zero wait states ? data is transferred on every clock pin compatible and functionally equivalent to zbt? devices internally self-timed output buffe r control to eliminate the need to use oe registered inputs for flow-through operation byte write capability 3.3 v / 2.5 v i/o power supply (v ddq ) fast clock-to-output times ? 6.5 ns (for 133-mhz device) clock enable (cen ) pin to enable clock and suspend operation synchronous self-timed writes asynchronous output enable available in jedec-standard and pb-free 100-pin tqfp, pb-free and non pb-free 119-ball bga package and 165-ball fbga package three chip enables for simple depth expansion. automatic power-down feature av ailable using zz mode or ce deselect ieee 1149.1 jtag-compatible boundary scan burst capability?linear or interleaved burst order low standby power functional description the cy7c1355c/cy7c1357c [1] is a 3.3 v, 256 k 36 / 512 k 18 synchronous flow-through burst sram designed specifically to support unlimited true back-to-back read/write operations without the insertion of wait states. the cy7c1355c/cy7c1357c is equipped with the advanced no bus latency (nobl) logic required to enable consecutive read/write operations with data being transferred on every clock cycle. this feature dramatically improves the thro ughput of data through the sram, especially in systems that require frequent write-read transitions. all synchronous inputs pass through input registers controlled by the rising edge of the clock. the clock input is qualified by the clock enable (cen ) signal, which when deasserted suspends operation and extends the previous clock cycle. maximum access delay from the clock ri se is 6.5 ns (133-mhz device). write operations are controlled by the two or four byte write select (bw x ) and a write enable (we ) input. all writes are conducted with on-chip synchron ous self-timed write circuitry. three synchronous chip enables (ce 1 , ce 2 , ce 3 ) and an asynchronous output enable (oe ) provide for easy bank selection and output tri-state c ontrol. in order to avoid bus contention, the output drivers ar e synchronously tri-stated during the data portion of a write sequence. note 1. for best-practices recommendations, please refer to the cypress application note system design guidelines on www.cypress.com . [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 2 of 32 c mode bw a bw b we ce1 ce2 ce3 oe read logic dqs dqp a dqp b dqp c dqp d memory array e input register bw c bw d address register write registry and data coherency control logic burst logic a0' a1' d1 d0 q1 q0 a0 a1 adv/ld ce adv/ld c clk cen write drivers d a t a s t e e r i n g s e n s e a m p s write address register a0, a1, a o u t p u t b u f f e r s e zz sleep control logic block diagram ? cy 7c1355c (256 k 36) [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 3 of 32 c mode bw a bw b we ce1 ce2 ce3 oe read logic dqs dqp a dqp b memory array e input register address register write registry and data coherency control logic burst logic a0' a1' d1 d0 q1 q0 a0 a1 adv/ld ce adv/ld c clk cen write drivers d a t a s t e e r i n g s e n s e a m p s write address register a0, a1, a o u t p u t b u f f e r s e zz sleep control logic block diagram ? cy7c1357c (512 k 18) [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 4 of 32 contents selection guide ................................................................ 5 pin configurations ........................................................... 5 pin definitions .................................................................. 9 functional overview ...................................................... 10 single read accesses .............................................. 10 burst read accesses ................................................ 10 single write accesses ............................................... 10 burst write accesses ................................................ 11 sleep mode ............................................................... 11 interleaved burst address table (mode = floating or vdd) ............................................. 11 linear burst address table (mode = gnd) ................ 11 zz mode electrical characteristics ............................... 11 truth table ...................................................................... 12 partial truth table for read/write ................................ 12 truth table for read/write ............................................ 12 ieee 1149.1 serial boundary sc an (jtag) ... ........... .... 13 disabling the jtag feature ...................................... 13 tap controller state diagram ....................................... 13 test access port (tap) ............................................. 13 tap controller block diagram ...................................... 13 performing a tap r eset .......... .............. .......... 14 tap registers ...................................................... 14 tap instruction set ................................................... 14 tap timing ...................................................................... 15 tap ac switching characteristics ............................... 15 3.3 v tap ac test conditions ....................................... 16 3.3 v tap ac output load equivalent ......................... 16 2.5 v tap ac test conditions ....................................... 16 2.5 v tap ac output load equivalent ......................... 16 tap dc electrical characteristics and operating conditions ..................................................... 16 identification register definitions ................................ 16 scan register sizes ....................................................... 17 identification codes ....................................................... 17 119-ball bga boundary scan order ............................. 18 165-ball fbga boundary scan order ........................... 19 maximum ratings ........................................................... 20 operating range ............................................................. 20 electrical characteristics ............................................... 20 capacitance .................................................................... 21 thermal resistance ........................................................ 21 ac test loads and waveforms ..................................... 21 switching characteristics .............................................. 22 switching waveforms .................................................... 23 read/write waveforms .............. ............ ........... ........ 23 nop, stall and deselect cycles ....................... 24 zz mode timing ........................................................ 25 ordering information ...................................................... 26 ordering code definitions ..... .................................... 26 package diagrams .......................................................... 27 package diagrams ........................................................ 29 acronyms ........................................................................ 30 document conventions ................................................. 30 units of measure ....................................................... 30 document history page ................................................. 31 sales, solutions, and legal information ...................... 32 worldwide sales and design s upport ......... .............. 32 products .................................................................... 32 psoc solutions ......................................................... 32 [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 5 of 32 selection guide description 133 mhz 100 mhz unit maximum access time 6.5 7.5 ns maximum operating current 250 180 ma maximum cmos standby current 40 40 ma pin configurations 100-pin tqfp pinout a a a a a1 a0 nc/288m nc/144m v ss v dd nc/36m a a a a a a dqp b dq b dq b v ddq v ss dq b dq b dq b dq b v ss v ddq dq b dq b v ss nc v dd dq a dq a v ddq v ss dq a dq a dq a dq a v ss v ddq dq a dq a dqp a dqp c dq c dq c v ddq v ss dq c dq c dq c dq c v ss v ddq dq c dq c vss/dnu v dd nc v ss dq d dq d v ddq v ss dq d dq d dq d dq d v ss v ddq dq d dq d dqp d a a ce 1 ce 2 bw d bw c bw b bw a ce 3 v dd v ss clk we cen oe nc/18m a a 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 a a adv/ld zz mode nc/72m cy7c1355c byte a byte b byte d byte c [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 6 of 32 pin configurations (continued) 100-pin tqfp pinout a a a a a1 a0 nc/288m nc/144m v ss v dd nc/36m a a a a a a a nc nc v ddq v ss nc dqp a dq a dq a v ss v ddq dq a dq a v ss nc v dd dq a dq a v ddq v ss dq a dq a nc nc v ss v ddq nc nc nc nc nc nc v ddq v ss nc nc dq b dq b v ss v ddq dq b dq b vss/dnu v dd nc v ss dq b dq b v ddq v ss dq b dq b dqp b nc v ss v ddq nc nc nc a a ce 1 ce 2 nc nc bw b bw a ce 3 v dd v ss clk we cen oe nc/18m a a 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 a a adv/ld zz mode nc/72m cy7c1357c byte a byte b [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 7 of 32 pin configurations (continued) 234567 1 a b c d e f g h j k l m n p r t u v ddq nc/576m nc/1g dqp c dq c dq d dq c dq d aa aa nc/18m v ddq ce 2 a dq c v ddq dq c v ddq v ddq v ddq dq d dq d nc/144m nc v ddq v dd clk v dd v ss v ss v ss v ss v ss v ss v ss v ss nc nc nc nc tdo tck tdi tms nc/36m nc/72m nc/288m v ddq v ddq v ddq aaa a ce 3 a a a a a a a0 a1 dq a dq c dq a dq a dq a dq b dq b dq b dq b dq b dq b dq b dq a dq a dq a dq a dq b v dd dq c dq c dq c v dd dq d dq d dq d dq d adv/ld nc ce 1 oe a we v ss v ss v ss v ss v ss v ss v ss v ss dqp a mode dqp d dqp b bw b bw c nc v dd nc bw a nc cen bw d zz 2 34567 1 a b c d e f g h j k l m n p r t u v ddq nc/576m nc/1g nc dq b dq b dq b dq b aa aa nc/18m v ddq ce 2 a nc v ddq nc v ddq v ddq v ddq nc nc nc/144m nc/72m v ddq v dd clk v dd v ss v ss v ss v ss v ss v ss v ss v ss nc nc nc nc tdo tck tdi tms a a nc/288m v ddq v ddq v ddq a nc/36m a a ce 3 a a a a a a a0 a1 dq a dq b nc nc dq a nc dq a dq a nc nc dq a nc dq a nc dq a nc dq a v dd nc dq b nc v dd dq b nc dq b nc adv/ld nc ce 1 oe a we v ss v ss v ss v ss v ss v ss v ss v ss nc mode dqp b dqp a v ss bw b nc v dd nc bw a nc cen v ss zz cy7c1357c (512 k 18) cy7c1355c (256 k 36) 119-ball bga pinout (3 chip enables with jtag) [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 8 of 32 pin configurations (continued) 165-ball fbga pinout (3 chip enables with jtag) cy7c1355c (256 k 36) 234 567 1 a b c d e f g h j k l m n p r tdo nc/576m nc/1g dqp c dq c dqp d nc dq d ce 1 bw b ce 3 bw c cen a ce2 dq c dq d dq d mode nc dq c dq c dq d dq d dq d nc/36m nc/72m v ddq bw d bw a clk we v ss v ss v ss v ss v ddq v ss v dd v ss v ss v ss v ss v ss v ss v ddq v ddq nc v ddq v ddq v ddq v ddq a a v dd v ss v dd v ss v ss v ddq v dd v ss v dd v ss v dd v ss v ss v ss v dd v dd v ss v dd v ss v ss nc tck v ss tdi a a dq c v ss dq c v ss dq c dq c nc v ss v ss v ss v ss nc v ss a1 dq d dq d nc/144m nc v ddq v ss tms 891011 nc/288m a a adv/ld nc oe nc/18m a nc v ss v ddq nc dqp b v ddq v dd dq b dq b dq b nc dq b nc dq a dq a v dd v ddq v dd v ddq dq b v dd nc v dd dq a v dd v ddq dq a v ddq v dd v dd v ddq v dd v ddq dq a v ddq a a v ss a a a dq b dq b dq b zz dq a dq a dqp a dq a a v ddq a a0 a v ss nc cy7c1357c (512 k 18) 234 567 1 a b c d e f g h j k l m n p r tdo nc/576m nc/1g nc nc dqp b nc dq b ce 1 nc ce 3 bw b cen a ce2 nc dq b dq b mode nc dq b dq b nc nc nc nc/36m nc/72m v ddq nc bw a clk we v ss v ss v ss v ss v ddq v ss v dd v ss v ss v ss v ss v ss v ss v ddq v ddq nc v ddq v ddq v ddq v ddq a a v dd v ss v dd v ss v ss v ddq v dd v ss v dd v ss v dd v ss v ss v ss v dd v dd v ss v dd v ss v ss nc tck v ss tdi a a dq b v ss nc v ss dq b nc nc v ss v ss v ss v ss nc v ss a1 dq b nc nc/144m nc v ddq v ss tms 891011 nc/288m a a adv/ld a oe nc/18m a nc v ss v ddq nc dqp a v ddq v dd nc dq a dq a nc nc nc dq a nc v dd v ddq v dd v ddq dq a v dd nc v dd nc v dd v ddq dq a v ddq v dd v dd v ddq v dd v ddq nc v ddq a a v ss a a a dq a nc nc zz dq a nc nc dq a a v ddq a a0 a v ss nc [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 9 of 32 pin definitions name i/o description a 0 , a 1 , a input- synchronous address inputs used to select one of the address locations . sampled at the rising edge of the clk. a [1:0] are fed to the two-bit burst counter. bw a , bw b bw c , bw d input- synchronous byte write inputs, active low . qualified with we to conduct writes to the sram. sampled on the rising edge of clk. we input- synchronous write enable input, active low . sampled on the rising edge of clk if cen is active low. this signal must be asserted low to initiate a write sequence. adv/ld input- synchronous advance/load input . used to advance the on-chip address counter or load a new address. when high (and cen is asserted low) the internal burs t counter is advanced. when low, a new address can be loaded into the device fo r an access. after being deselected, adv/ld should be driven low in order to load a new address. clk input- clock clock input . used to capture all synchronous inputs to the device. clk is qualified with cen . clk is only recognized if cen is active low. ce 1 input- synchronous chip enable 1 input, active low . sampled on the rising edge of clk. used in conjunction with ce 2 , and ce 3 to select/deselect the device. ce 2 input- synchronous chip enable 2 input, active high . sampled on the rising edge of clk. used in conjunction with ce 1 and ce 3 to select/deselect the device. ce 3 input- synchronous chip enable 3 input, active low . sampled on the rising edge of clk. used in conjunction with ce 1 and ce 2 to select/desel ect the device. oe input- asynchronous output enable, asynchronous input, active low . combined with the synchronous logic block inside the device to control the directio n of the i/o pins. when low, the i/o pins are allowed to behave as outputs. when deassert ed high, i/o pins are tri-stated, and act as input data pins. oe is masked during the data portion of a write sequence, during the first clock when emerging from a deselected stat e, when the device has been deselected. cen input- synchronous clock enable input, active low . when asserted low the clock signal is recognized by the sram. when deasserted high the clock signal is masked. since deasserting cen does not deselect the device, cen can be used to extend the previous cycle when required. zz input- asynchronous zz ?sleep? input . this active high input places the device in a non-time critical ?sleep? condition with data integrity preserved. for normal operation, this pin has to be low or left floating. zz pin has an internal pull-down. dq s i/o- synchronous bidirectional data i/o lines . as inputs, they feed into an on-chip data register that is triggered by the rising edge of clk. as output s, they deliver the data contained in the memory location specified by the a ddresses presented during the previous clock rise of the read cycle. the direction of the pins is controlled by oe . when oe is asserted low, the pins behave as outputs. when high, dq s and dqp x are placed in a tri-state condition.the outputs are automatically tri-stated during th e data portion of a write sequence, during the first clock when emerging from a deselect ed state, and when the device is deselected, regardless of the state of oe . dqp x i/o- synchronous bidirectional data parity i/o lines. functionally, these signals are identical to dq s . during write sequences, dqp x is controlled by bw x correspondingly. mode input strap pin mode input. selects the burst order of the device . when tied to gnd selects linear burst sequence. when tied to v dd or left floating selects interleaved burst sequence. v dd power supply power supply inputs to the core of the device . v ddq i/o power supply power supply for the i/o circuitry . v ss ground ground for the device . tdo jtag serial output synchronous serial data-out to the jtag circuit . delivers data on the negative edge of tck. if the jtag feature is not being utilized, th is pin should be left unconnect ed. this pin is not available on tqfp packages. tdi jtag serial input synchronous serial data-in to the jtag circuit . sampled on the rising edge of tck. if the jtag feature is not being utilized, this pin can be left floating or connected to v dd through a pull-up resistor. this pin is not available on tqfp packages. [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 10 of 32 functional overview the cy7c1355c/cy7c1357c is a synchronous flow-through burst sram designed specifically to eliminate wait states during write-read transitions. all synchronous inputs pass through input registers controlled by the rising edge of the clock. the clock signal is qualified with the clock enable input signal (cen ). if cen is high, the clock signal is not recognized and all internal states are maintained. all synch ronous operations are qualified with cen . maximum access delay from the clock rise (t cdv ) is 6.5 ns (133-mhz device). accesses can be initiated by asserting all three chip enables (ce 1 , ce 2 , ce 3 ) active at the rising edge of the clock. if clock enable (cen ) is active low and adv/ld is asserted low, the address presented to the device will be latched. the access can either be a read or write oper ation, depending on the status of the write enable (we ). bw x can be used to conduct byte write operations. write operations are qualified by the write enable (we ). all writes are simplified with on- chip synchronous self-t imed write circuitry. three synchronous chip enables (ce 1 , ce 2 , ce 3 ) and an asynchronous output enable (oe ) simplify depth expansion. all operations (reads, writes, and de selects) are pipelined. adv/ld should be driven low once the device has been deselected in order to load a new address for the next operation. single read accesses a read access is initiated when the following conditions are satisfied at clock rise: (1) cen is asserted low, (2) ce 1 , ce 2 , and ce 3 are all asserted active, (3) the write enable input signal we is deasserted high, and 4) adv/ld is asserted low. the address presented to the address inputs is latched into the address register and presented to the memory array and control logic. the control logic determines that a read access is in progress and allows the requested data to propagate to the output buffers. the data is av ailable within 7.5 ns (133-mhz device) provided oe is active low. after the first clock of the read access, the output buffers are controlled by oe and the internal control logic. oe must be driven low in order for the device to drive out the requested data. on the subsequent clock, another operation (re ad/write/deselect) can be initiated. when the sram is deselected at clock rise by one of the chip enable signals, its output will be tri-stated immediately. burst read accesses the cy7c1355c/cy7c1357c has an on-chip burst counter that allows the user the ability to supply a single address and conduct up to four reads without reasserting the address inputs. adv/ld must be driven low in order to load a new address into the sram, as described in the single read accesses section above. the sequence of the burst counter is determined by the mode input signal. a low input on mode selects a linear burst mode, a high selects an interleaved burst sequence. both burst counters use a0 and a1 in the burst sequence, and will wrap around when incremented sufficiently. a high input on adv/ld will increment the internal burst counter regardless of the state of chip enable inputs or we . we is latched at the beginning of a burst cycle. therefore, the type of access (read or write) is maintained throughout the burst sequence. single write accesses write access are initiated when the following conditions are satisfied at clock rise: (1) cen is asserted low, (2) ce 1 , ce 2 , and ce 3 are all asserted active, and (3) the write signal we is asserted low. the address pr esented to the address bus is loaded into the address register. the write signals are latched into the control logic block. the data lines are automatically tri-stated regardless of the state of the oe input signal. this allows the external logic to present the data on dqs and dqp x . on the next clock rise the data presented to dqs and dqp x (or a subset for byte write operations, see truth table for details) inputs is latched into the device and the write is complete. additional accesses (read/write/deselect) can be initiated on this cycle. the data written during the writ e operation is controlled by bw x signals. the cy7c1355c/cy7c1357c provides byte write capability that is described in t he truth table. asserting the write enable input (we ) with the selected byte write select input will selectively write to only the de sired bytes. bytes not selected during a byte write operation will remain unaltered. a synchronous self-timed write me chanism has been provided to simplify the write operations. byte write capability has been included in order to greatly simplify read/modify/write sequences, which can be reduced to simple byte write operations. because the cy7c1355c/cy7c1357c is a common i/o device, data should not be driven into the device while the outputs are active. the output enable (oe ) can be deasserted high before presenting data to the dqs and dqp x inputs. doing so will tms jtag serial input synchronous serial data-in to the jtag circuit . sampled on the rising edge of tck. if the jtag feature is not being utilized, this pin can be disconnected or connected to v dd . this pin is not available on tqfp packages. tck jtag clock clock input to the jtag circuitry . if the jtag feature is not being utilized, this pin must be connected to v ss . this pin is not available on tqfp packages. nc ? no connects . not internally connected to the die. 18-mbit, 36-mbit, 72-mbit, 144-mbit, 288-mbit, 576-mbit and 1-gbit are address expa nsion pins and are not internally connected to the die. v ss /dnu ground/dnu this pin can be connected to ground or should be left floating. pin definitions (continued) name i/o description [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 11 of 32 tri-state the output drivers. as a safety precaution, dqs and dqp x are automatically tri-stated during the data portion of a write cycle, regardless of the state of oe . burst write accesses the cy7c1355c/cy7c1357c has an on-chip burst counter that allows the user the ability to supply a single address and conduct up to four write operations without reasserting the address inputs. adv/ld must be driven low in order to load the initial address, as described in the single write accesses section above. when adv/ld is driven high on the subsequent clock rise, the chip enables (ce 1 , ce 2 , and ce 3 ) and we inputs are ignored and the burst counter is incremented. the correct bw x inputs must be driven in each cycle of the burst wr ite, in order to write the correct bytes of data. sleep mode the zz input pin is an asynchronous input. asserting zz places the sram in a power conservation ?sleep? mode. two clock cycles are required to enter into or exit from this ?sleep? mode. while in this mode, data integrity is guaranteed. accesses pending when entering the ?sleep? mode are not considered valid nor is the completion of the o peration guaranteed. the device must be deselected prior to entering the ?sleep? mode. ce 1 , ce 2 , and ce 3 , must remain inactive for the duration of t zzrec after the zz input returns low. interleaved burst address table (mode = floating or v dd ) first address a1: a0 second address a1: a0 third address a1: a0 fourth address a1: a0 00 01 10 11 01 00 11 10 10 11 00 01 11 10 01 00 linear burst address table (mode = gnd) first address a1: a0 second address a1: a0 third address a1: a0 fourth address a1: a0 00 01 10 11 01 10 11 00 10 11 00 01 11 00 01 10 zz mode electrical characteristics parameter description test conditions min max unit i ddzz sleep mode standby current zz > v dd ? 0.2 v ? 50 ma t zzs device operation to zz zz > v dd ? 0.2 v ? 2t cyc ns t zzrec zz recovery time zz < 0.2 v 2t cyc ?ns t zzi zz active to sleep current t his parameter is sampled ? 2t cyc ns t rzzi zz inactive to exit sleep current this parameter is sampled 0 ? ns [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 12 of 32 truth table [2, 3, 4, 5, 6, 7, 8] operation address used ce 1 ce 2 ce 3 zz adv/ld we bw x oe cen clk dq deselect cycle none h x x l l x x x l l->h tri-state deselect cycle none x x h l l x x x l l->h tri-state deselect cycle none x l x l l x x x l l->h tri-state continue deselect cycle none x x x l h x x x l l->h tri-state read cycle (begin burst) extern al l h l l l h x l l l->h data out (q) read cycle (continue burst) next x x x l h x x l l l->h data out (q) nop/dummy read (begin burst) external l h l l l h x h l l->h tri-state dummy read (continue burst) next x x x l h x x h l l->h tri-state write cycle (begin burst) external l h l l l l l x l l->h data in (d) write cycle (continue burst) next x x x l h x l x l l->h data in (d) nop/write abort (begin burst) none l h l l l l h x l l->h tri-state write abort (continue burst) next x x x l h x h x l l->h tri-state ignore clock edge (stall) current x x x l x x x x h l->h ? sleep mode none x x x h x x x x x x tri-state partial truth table for read/write [2, 3, 9] function (cy7c1355c) we bw a bw b bw c bw d read h x x x x write no bytes written l h h h h write byte a ? (dq a and dqp a )llhhh write byte b ? (dq b and dqp b )lhlhh write byte c ? (dq c and dqp c )lhhlh write byte d ? (dq d and dqp d )lhhhl write all bytes l l l l l truth table for read/write [2, 3, 9] function (cy7c1357c) we bw a bw b read h x x write - no bytes written l h h write byte a ? (dq a and dqp a )lhh write byte b ? (dq b and dqp b )lhh write all bytes l l l notes 2. x = ?don't care.? h = logic high, l = logic low. bw x = l signifies at least one byte write select is active, bw x = valid signifies that the desired byte write selects are asserted, see truth table for details. 3. write is defined by bw x , and we . see truth table for read/write. 4. when a write cycle is detected, all i/os are tri-stated, even during byte writes. 5. the dqs and dqp x pins are controlled by the current cycle and the oe signal. oe is asynchronous and is not sampled with the clock. 6. cen = h, inserts wait states. 7. device will power-up deselected and the i/os in a tri-state condition, regardless of oe . 8. oe is asynchronous and is not sampled with the clock rise. it is masked internally during write cycles. during a read cycle dqs a nd dqp x = tri-state when oe is inactive or when the device is deselected, and dqs and dqp x = data when oe is active. 9. table only lists a partial listing of the byte write combinations. any combination of bw x is valid. appropriate write will be done based on which byte write is active. [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 13 of 32 ieee 1149.1 serial boundary scan (jtag) the cy7c1355c/cy7c1357c incorporates a serial boundary scan test access port (tap) in the bga package only. the tqfp package does not offer this functi onality. this part operates in accordance with ieee standard 1 149.1-1900, but doesn?t have the set of functions required for full 1149.1 compliance. these functions from the ieee specific ation are excluded because their inclusion places an added delay in the critical speed path of the sram. note the tap controller functions in a manner that does not conflict with the operation of other devices using 1149.1 fully compliant taps. the tap operates using jedec-standard 3.3 v or 2.5 v i/o logic levels. the cy7c1355c/cy7c1357c contains a tap controller, instruction register, boundary scan register, bypass register, and id register. disabling the jtag feature it is possible to operate the sram without using the jtag feature. to disable the tap controller, tck must be tied low(v ss ) to prevent clocking of the device. tdi and tms are internally pulled up and may be unconnected. they may alternately be connected to v dd through a pull-up resistor. tdo should be left unconnected. upon power-up, the device will come up in a reset state which wil l not interfere with the operation of the device. tap controller state diagram the 0/1 next to each state represents the value of tms at the rising edge of the tck. test access port (tap) test clock (tck) the test clock is used only with the tap controller. all inputs are captured on the rising edge of tck. all outputs are driven from the falling edge of tck. test mode select (tms) the tms input is used to give commands to the tap controller and is sampled on the rising edge of tck. it is allowable to leave this ball unconnected if the tap is not used. the ball is pulled up internally, resulting in a logic high level. test data-in (tdi) the tdi ball is used to serially in put information into the registers and can be connected to the inpu t of any of the registers. the register between tdi and tdo is chosen by the instruction that is loaded into the tap instruction register. tdi is internally pulled up and can be unconnected if the tap is unused in an application. tdi is connected to the most significant bit (msb) of any register. (see tap controller block diagram .) test data-out (tdo) the tdo output ball is used to serially clock data-out from the registers. the output is active depending upon the current state of the tap state machine. the output changes on the falling edge of tck. tdo is connected to the least significant bit (lsb) of any register. (see tap controller state diagram .) tap controller block diagram test-logic reset run-test/ idle select dr-scan select ir-scan capture-dr shift-dr capture-ir shift-ir exit1-dr pause-dr exit1-ir pause-ir exit2-dr update-dr exit2-ir update-ir 1 1 1 0 1 1 0 0 1 1 1 0 0 0 0 0 0 0 0 0 1 0 1 1 0 1 0 1 1 1 1 0 bypass register 0 instruction register 0 1 2 identification register 0 1 2 29 30 31 . . . boundary scan register 0 1 2 . . x . . . s election circuitr y selection circuitry tck tms tap controller tdi tdo [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 14 of 32 performing a tap reset a reset is performed by forcing tms high (v dd ) for five rising edges of tck. this reset does no t affect the operation of the sram and may be performed while the sram is operating. at power-up, the tap is reset in ternally to ensure that tdo comes up in a high z state. tap registers registers are connected betwe en the tdi and tdo balls and allow data to be scanned into and out of the sram test circuitry. only one register can be selected at a time through the instruction register. data is serially loaded into the tdi ball on the rising edge of tck. data is output on the tdo ball on the falling edge of tck. instruction register three-bit instructions can be seri ally loaded into the instruction register. this register is loaded when it is placed between the tdi and tdo balls as shown in the tap controller block diagram on page 13. upon power-up, the instruction register is loaded with the idcode instruction. it is also loaded with the idcode instruction if the controller is pl aced in a reset state as described in the previous section. when the tap controller is in t he capture-ir state, the two least significant bits are loaded with a binary ?01? pattern to allow for fault isolation of the board-le vel serial test data path. bypass register to save time when serially shifting data through registers, it is sometimes advantageous to skip certain chips. the bypass register is a single-bit register that can be placed between the tdi and tdo balls. this allows data to be shifted through the sram with minimal delay. the bypass register is set low (v ss ) when the bypass instruct ion is executed. boundary scan register the boundary scan register is connected to all the input and bidirectional balls on the sram. the boundary scan register is lo aded with the contents of the ram i/o ring when the tap contro ller is in the capture-dr state and is then placed between the tdi and tdo balls when the controller is moved to the shift-dr state. the extest, sample/preload and sample z in structions can be used to capture the contents of the i/o ring. the boundary scan order tables show the order in which the bits are connected. each bit corresponds to one of the bumps on the sram package. the msb of the register is connected to tdi, and the lsb is connected to tdo. identification (id) register the id register is loaded with a vendor-specific, 32-bit code during the capture-dr stat e when the idcode command is loaded in the instruction register . the idcode is hardwired into the sram and can be shifted out when the tap controller is in the shift-dr state. the id regi ster has a vendor code and other information described in the identification register definitions table. tap instruction set overview eight different instructions are possible with the three bit instruction register. all combinatio ns are listed in the instruction codes table. three of these instructions are listed as reserved and should not be used. the other five instructions are described in detail below. instructions are loaded into the tap controller during the shift-ir state when the instruction register is placed between tdi and tdo. during this state, instructions are shifted through the instruction register through the tdi and tdo balls. to execute the instruction once it is shifted in, the tap controller needs to be moved into the update-ir state. idcode the idcode instruction causes a vendor-specific, 32-bit code to be loaded into the instruction register. it also places the instruction register between the tdi and tdo balls and allows the idcode to be shifted out of the device when the tap controller enters the shift-dr st ate.the idcode instruction is loaded into the instruction regi ster upon power-up or whenever the tap controller is given a test logic reset state. sample z the sample z instruction causes the boundary scan register to be connected between the tdi and tdo pins when the tap controller is in a shift-dr st ate. the sample z command puts the output bus into a high z state until the next command is given during the ?update ir? state. sample/preload sample/preload is a 1149.1 mandatory instruction. when the sample/preload instruct ions are loaded into the instruction register and the tap controller is in the capture-dr state, a snapshot of data on the inputs and output pins is captured in the boundary scan register. the user must be aware that the tap controller clock can only operate at a frequency up to 20 mhz, while the sram clock operates more than an order of magnitude faster. because there is a large difference in the clock frequencies, it is possible that during the capture-dr state, an input or output will undergo a transition. the tap may then tr y to capture a signal while in transition (metastable state). this will not harm the device, but there is no guarantee as to the value that will be captured. repeatable results may not be possible. to guarantee that the boundary scan register will capture the correct value of a signal, the sram signal must be stabilized long enough to meet the tap controller?s capture set-up plus hold times (t cs and t ch ). the sram clock input might not be captured correctly if there is no way in a design to stop (or slow) the clock during a sample/preload instruction. if this is an issue, it is still possible to capture all other signals and simply ignore the value of the ck an d ck# captured in the boundary scan register. once the data is captured, it is possible to shift out the data by putting the tap into the shift-dr state. this places the boundary scan register between the tdi and tdo pins. [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 15 of 32 preload allows an initial data pattern to be placed at the latched parallel outputs of the b oundary scan register cells prior to the selection of another boundary scan test operation. the shifting of data for the sample and preload phases can occur concurrently when required?that is, while data captured is shifted out, the preloaded data can be shifted in. bypass when the bypass instru ction is loaded in th e instruction register and the tap is placed in a shift- dr state, the by pass register is placed between the tdi and tdo pins. the advantage of the bypass instruction is that it shortens the boundary scan path when multiple devices are connected together on a board. extest the extest instruction enables the preloaded data to be driven out through the system ou tput pins. this inst ruction also selects the boundary scan register to be connected for serial access between the tdi and tdo in the shift-dr controller state. reserved these instructions are not im plemented but are reserved for future use. do not use these instructions. tap timing tap ac switchi ng characteristics over the operating range [10, 11] parameter description min max unit clock t tcyc tck clock cycle time 50 ? ns t tf tck clock frequency ? 20 mhz t th tck clock high time 20 ? ns t tl tck clock low time 20 ? ns output times t tdov tck clock low to tdo valid ? 10 ns t tdox tck clock low to tdo invalid 0 ? ns set-up times t tmss tms set-up to tck clock rise 5 ? ns t tdis tdi set-up to tck clock rise 5 ? ns t cs capture set-up to tck rise 5 ? ns hold times t tmsh tms hold after tck clock rise 5 ? ns t tdih tdi hold after clock rise 5 ? ns t ch capture hold after clock rise 5 ? ns notes 10. t cs and t ch refer to the set-up and hold time requirements of latching data from the boundary scan register. 11. test conditions are sp ecified using the load in tap ac test conditions. t r /t f = 1 ns. t tl test clock (tck) 123456 test mode select (tms) t th test data-out (tdo) t cyc test data-in (tdi) t tmsh t tmss t tdih t tdis t tdox t tdov don?t care undefined [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 16 of 32 3.3 v tap ac test conditions input pulse levels................................................v ss to 3.3 v input rise and fall times....................................................1 ns input timing reference levels...... .................................... 1.5 v output reference levels ................................................. 1.5 v test load termination supply voltage ............................. 1.5 v 3.3 v tap ac out put load equivalent 2.5 v tap ac test conditions input pulse levels................................................ v ss to 2.5 v input rise and fall time .....................................................1 ns input timing reference levels.... .................................... 1.25 v output reference levels .............. ................................. 1.25 v test load termination supply vo ltage ........................... 1.25 v 2.5 v tap ac output load equivalent tdo 1.5v 20pf z = 50 o 50 tdo 1.25v 20pf z = 50 o 50 (0 c < t a < +70 c; v dd = 3.3 v 0.165 v unless otherwise noted) [12] parameter description conditions min max unit v oh1 output high voltage i oh = ?4.0 ma, v ddq = 3.3 v i oh = ?1.0 ma, v ddq = 2.5 v 2.4 ? v 2.0 ? v v oh2 output high voltage i oh = ?100 a v ddq = 3.3 v 2.9 ? v v ddq = 2.5 v 2.1 ? v v ol1 output low voltage i ol = 8.0 ma v ddq = 3.3 v ? 0.4 v i ol = 8.0 ma v ddq = 2.5 v ? 0.4 v v ol2 output low voltage i ol = 100 a v ddq = 3.3 v ? 0.2 v v ddq = 2.5 v ? 0.2 v v ih input high voltage v ddq = 3.3 v 2.0 v dd + 0.3 v v ddq = 2.5 v 1.7 v dd + 0.3 v v il input low voltage v ddq = 3.3 v ?0.5 0.7 v v ddq = 2.5 v ?0.3 0.7 v i x input load current gnd < v in < v ddq ?5 5 a identification regi ster definitions instruction field cy7c1355c (256 k 36) cy7c1357c (512 k 18) description revision number (31:29) 010 010 describes the version number device depth (28:24) 01010 01010 reserved for internal use device width (23:18) 001001 001001 defines memory type and architecture cypress device id (17:12) 100110 010110 defines width and density cypress jedec id code (11:1) 00000110100 00000110100 allows unique identification of sram vendor id register presence indicator (0) 1 1 indicates the presence of an id register note 12. all voltages referenced to v ss (gnd). [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 17 of 32 scan register sizes register name bit size ( 36) bit size ( 18) instruction 3 3 bypass 1 1 id 32 32 boundary scan order (119-ball bga package) 69 69 boundary scan order (165-ball fbga package) 69 69 identification codes instruction code description extest 000 captures i/o ring contents. places the boundary scan register between tdi and tdo. forces all sram outputs to high z state. this instruction is not 1149.1 compliant. idcode 001 loads the id register with the vendor id code and places the register between tdi and tdo. this operation does not affect sram operations. sample z 010 captures i/o ring contents. places the boundary scan register between tdi and tdo. forces all sram output drivers to a high z state. reserved 011 do not use: this instruct ion is reserved for future use. sample/preload 100 captures i/o ring contents. places the boundary scan register between tdi and tdo. does not affect sram operation. this instructio n does not implement 1149.1 preload function and is therefore not 1149.1 compliant. reserved 101 do not use: this instruct ion is reserved for future use. reserved 110 do not use: this instruct ion is reserved for future use. bypass 111 places the bypass register between tdi and tdo. this operation does not affect sram operations. [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 18 of 32 119-ball bga boundary scan order cy7c1355c (256 k 36) cy7c1357c (512 k 18) bit# ball id signal name bit# ball id signal name bit# ball id signal name bit# ball id signal name 1 k4 clk 37 r6 a 1 k4 clk 37 r6 a 2h4 we 38 t5 a 2 h4 we 38 t5 a 3m4 cen 39 t3 a 3 m4 cen 39 t3 a 4f4 oe 40 r2 a 4 f4 oe 40 r2 a 5b4adv/ld 41 r3 mode 5 b4 adv/ld 41 r3 mode 6g4 a 42 p2 dqp d 6 g4 a 42 internal internal 7c3 a 43 p1 dq d 7 c3 a 43 internal internal 8 b3 a 44 l2 dq d 8 b3 a 44 internal internal 9d6dqp b 45 k1 dq d 9 t2 a 45 internal internal 10 h7 dq b 46 n2 dq d 10 internal internal 46 p2 dqp b 11 g6 dq b 47 n1 dq d 11 internal internal 47 n1 dq b 12 e6 dq b 48 m2 dq d 12 internal internal 48 m2 dq b 13 d7 dq b 49 l1 dq d 13 d6 dqp a 49 l1 dq b 14 e7 dq b 50 k2 dq d 14 e7 dq a 50 k2 dq b 15 f6 dq b 51 internal internal 15 f6 dq a 51 internal internal 16 g7 dq b 52 h1 dq c 16 g7 dq a 52 h1 dq b 17 h6 dq b 53 g2 dq c 17 h6 dq a 53 g2 dq b 18 t7 zz 54 e2 dq c 18 t7 zz 54 e2 dq b 19 k7 dq a 55 d1 dq c 19 k7 dq a 55 d1 dq b 20 l6 dq a 56 h2 dq c 20 l6 dq a 56 internal internal 21 n6 dq a 57 g1 dq c 21 n6 dq a 57 internal internal 22 p7 dq a 58 f2 dq c 22 p7 dq a 58 internal internal 23 n7 dq a 59 e1 dq c 23 internal internal 59 internal internal 24 m6 dq a 60 d2 dqp c 24 internal internal 60 internal internal 25 l7 dq a 61 c2 a 25 internal internal 61 c2 a 26 k6 dq a 62 a2 a 26 internal internal 62 a2 a 27 p6 dqp a 63 e4 ce 1 27 internal internal 63 e4 ce 1 28 t4 a 64 b2 ce 2 28 t6 a 64 b2 ce 2 29 a3 a 65 l3 bw d 29 a3 a 65 internal internal 30 c5 a 66 g3 bw c 30 c5 a 66 g3 bw b 31 b5 a 67 g5 bw b 31 b5 a 67 internal internal 32 a5 a 68 l5 bw a 32 a5 a 68 l5 bw a 33 c6 a 69 b6 ce 3 33 c6 a 69 b6 ce 3 34 a6 a 34 a6 a 35 p4 a0 35 p4 a0 36 n4 a1 36 n4 a1 [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 19 of 32 165-ball fbga bo undary scan order cy7c1355c (256 k 36) cy7c1357c (512 k 18) bit# ball id signal name bit# ball id signal name bit# ball id signal name bit# ball id signal name 1 b6 clk 37 r4 a 1 b6 clk 37 r4 a 2b7 we 38 p4 a 2 b7 we 38 p4 a 3a7cen 39 r3 a 3 a7 cen 39 r3 a 4b8 oe 40 p3 a 4 b8 oe 40 p3 a 5a8adv/ld 41 r1 mode 5 a8 adv/ld 41 r1 mode 6 a9 a 42 n1 dqp d 6 a9 a 42 internal internal 7b10 a 43 l2 dq d 7 b10 a 43 internal internal 8a10 a 44 k2 dq d 8 a10 a 44 internal internal 9c11dqp b 45 j2 dq d 9 a11 a 45 internal internal 10 e10 dq b 46 m2 dq d 10 internal internal 46 n1 dqp b 11 f10 dq b 47 m1 dq d 11 internal internal 47 m1 dq b 12 g10 dq b 48 l1 dq d 12 internal internal 48 l1 dq b 13 d10 dq b 49 k1 dq d 13 c11 dqp a 49 k1 dq b 14 d11 dq b 50 j1 dq d 14 d11 dq a 50 j1 dq b 15 e11 dq b 51 internal internal 15 e11 dq a 51 internal internal 16 f11 dq b 52 g2 dq c 16 f11 dq a 52 g2 dq b 17 g11 dq b 53 f2 dq c 17 g11 dq a 53 f2 dq b 18 h11 zz 54 e2 dq c 18 h11 zz 54 e2 dq b 19 j10 dq a 55 d2 dq c 19 j10 dq a 55 d2 dq b 20 k10 dq a 56 g1 dq c 20 k10 dq a 56 internal internal 21 l10 dq a 57 f1 dq c 21 l10 dq a 57 internal internal 22 m10 dq a 58 e1 dq c 22 m10 dq a 58 internal internal 23 j11 dq a 59 d1 dq c 23 internal internal 59 internal internal 24 k11 dq a 60 c1 dqp c 24 internal internal 60 internal internal 25 l11 dq a 61 b2 a 25 internal internal 61 b2 a 26 m11 dq a 62 a2 a 26 internal internal 62 a2 a 27 n11 dqp a 63 a3 ce 1 27 internal internal 63 a3 ce 1 28 r11 a 64 b3 ce 2 28 r11 a 64 b3 ce 2 29 r10 a 65 b4 bw d 29 r10 a 65 internal internal 30 p10 a 66 a4 bw c 30 p10 a 66 inte rnal internal 31 r9 a 67 a5 bw b 31 r9 a 67 a4 bw b 32 p9 a 68 b5 bw a 32 p9 a 68 b5 bw a 33 r8 a 69 a6 ce 3 33 r8 a 69 a6 ce 3 34 p8 a 34 p8 a 35 r6 a0 35 r6 a0 36 p6 a1 36 p6 a1 [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 20 of 32 maximum ratings exceeding maximum ratings may shorten the useful life of the device. user guidelines are not tested. storage temperature .. ............... ............... ?65 c to +150 c ambient temperature with power applied ............. ............... ............... ?55 c to +125 c supply voltage on v dd relative to gnd ........?0.5 v to +4.6 v supply voltage on v ddq relative to gnd....... ?0.5 v to +v dd dc voltage applied to outputs in tri-state...........................................?0.5 v to v ddq + 0.5 v dc input voltage .................................. ?0.5 v to v dd + 0.5 v current into outputs (low) ......................................... 20 ma static discharge voltage........................................... > 2001 v (per mil-std-883, method 3015) latch-up current .................................................... > 200 ma. operating range range ambient temperature v dd v ddq commercial 0 c to +70 c 3.3 v ? 5% / + 10% 2.5 v ? 5% to v dd industrial ?40 c to +85 c electrical characteristics over the operating range [13, 14] parameter description test conditions min max unit v dd power supply voltage 3.135 3.6 v v ddq i/o supply voltage for 3.3 v i/o 3.135 v dd v for 2.5 v i/o 2.375 2.625 v v oh output high voltage for 3.3 v i/o, i oh = ? 4.0 ma 2.4 ? v for 2.5 v i/o, i oh = ? 1.0 ma 2.0 ? v v ol output low voltage for 3.3 v i/o, i ol = 8.0 ma ? 0.4 v for 2.5 v i/o, i ol = 1.0 ma ? 0.4 v v ih input high voltage [13] for 3.3 v i/o 2.0 v dd + 0.3 v v for 2.5 v i/o 1.7 v dd + 0.3 v v v il input low voltage [13] for 3.3 v i/o ?0.3 0.8 v for 2.5 v i/o ?0.3 0.7 v i x input leakage current except zz and mode gnd v i v ddq ?5 5 a input current of mode input = v ss ?30 ? a input = v dd ?5a input current of zz input = v ss ?5 ? a input = v dd ?30a i oz output leakage current gnd v i v ddq, output disabled ?5 5 a i dd v dd operating supply current v dd = max, i out = 0 ma, f = f max = 1/t cyc 7.5-ns cycle, 133 mhz ? 250 ma 10-ns cycle, 100 mhz ? 180 ma i sb1 automatic ce power-down current?ttl inputs v dd = max, device deselected, v in v ih or v in v il f = f max , inputs switching all speeds ? 110 ma i sb2 automatic ce power-down current?cmos inputs v dd = max, device deselected, v in 0.3 v or v in > v dd ? 0.3 v, f = 0, inputs static all speeds ? 40 ma i sb3 automatic ce power-down current?cmos inputs v dd = max, device deselected, or v in 0.3 v or v in > v ddq ? 0.3 v f = f max , inputs switching all speeds ? 100 ma i sb4 automatic ce power-down current?ttl inputs v dd = max, device deselected, v in v ih or v in v il , f = 0, inputs static all speeds ? 40 ma notes 13. overshoot: v ih (ac) < v dd + 1.5 v (pulse width less than t cyc /2), undershoot: v il (ac) > ?2 v (pulse width less than t cyc /2). 14. t power-up : assumes a linear ramp from 0 v to v dd (min) within 200 ms. during this time v ih < v dd and v ddq < v dd . [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 21 of 32 capacitance [15] parameter description test conditions 100 tqfp max 119 bga max 165 fbga max unit c in input capacitance t a = 25 c, f = 1 mhz, v dd = 3.3 v. v ddq = 2.5 v 555pf c clk clock input capacitance 5 5 5 pf c i/o input/output capacitance 5 7 7 pf thermal resistance [15] parameter description test conditions 100 tqfp package 119 bga package 165 fbga package unit ja thermal resistance (junction to ambient) test conditions follow standard test methods and procedures for measuring thermal impedance, per eia/jesd51. 29.41 34.1 16.8 c/w jc thermal resistance (junction to case) 6.31 14.0 3.0 c/w ac test loads and waveforms note 15. tested initially and after any design or process change that may affect these parameters. output r = 317 r = 351 5pf including jig and scope (a) (b) output r l = 50 z 0 = 50 v t = 1.5 v 3.3 v all input pulses v ddq gnd 90% 10% 90% 10% 1 ns 1 ns (c) output r = 1667 r = 1538 5pf including jig and scope (a) (b) output r l = 50 z 0 = 50 v t = 1.25 v 2.5 v all input pulses v ddq gnd 90% 10% 90% 10% 1 ns 1 ns (c) 3.3 v i/o test load 2.5 v i/o test load [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 22 of 32 switching characteristics over the operating range [16, 17] parameter description ?133 ?100 unit min max min max t power v dd (typical) to the first access [18] 1? 1?ms clock t cyc clock cycle time 7.5 ? 10 ? ns t ch clock high 3.0 ? 4.0 ? ns t cl clock low 3.0 ? 4.0 ? ns output times t cdv data output valid after clk rise ? 6.5 ? 7.5 ns t doh data output hold after clk rise 2.0 ? 2.0 ? ns t clz clock to low z [19, 20, 21] 0? 0?ns t chz clock to high z [19, 20, 21] ?3.5 ?3.5ns t oev oe low to output valid ? 3.5 ? 3.5 ns t oelz oe low to output low z [19, 20, 21] 0? 0?ns t oehz oe high to output high z [19, 20, 21] ?3.5 ?3.5ns set-up times t as address set-up before clk rise 1.5 ? 1.5 ? ns t als adv/ld set-up before clk rise 1.5 ? 1.5 ? ns t wes we , bw x set-up before clk rise 1.5 ? 1.5 ? ns t cens cen set-up before clk rise 1.5 ? 1.5 ? ns t ds data input set-up before clk rise 1.5 ? 1.5 ? ns t ces chip enable set-up before clk rise 1.5 ? 1.5 ? ns hold times t ah address hold after clk rise 0.5 ? 0.5 ? ns t alh adv/ld hold after clk rise 0.5 ? 0.5 ? ns t weh we , bw x hold after clk rise 0.5 ? 0.5 ? ns t cenh cen hold after clk rise 0.5 ? 0.5 ? ns t dh data input hold after clk rise 0.5 ? 0.5 ? ns t ceh chip enable hold after clk rise 0.5 ? 0.5 ? ns notes 16. timing reference level is 1.5 v when v ddq = 3.3 v and is 1.25 v when v ddq = 2.5 v. 17. test conditions shown in (a) of ac test loads unless otherwise noted. 18. this part has a voltage regulator internally; t power is the time that the power needs to be supplied above v dd (minimum) initially, before a read or write operation can be initiated. 19. t chz , t clz ,t oelz , and t oehz are specified with ac test conditions shown in part (b) of ac test loads. transition is measured 200 mv from steady-state vo ltage. 20. at any given voltage and temperature, t oehz is less than t oelz and t chz is less than t clz to eliminate bus contention between srams when sharing the same data bus. these specifications do not imply a bus contention condition, but reflect parameters guaranteed over worst case user conditions. device is designed to achieve high z prior to low z under the same system conditions. 21. this parameter is sampled and not 100% tested. [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 23 of 32 switching waveforms read/write waveforms [22, 23, 24] notes 22. for this waveform zz is tied low. 23. when ce is low, ce 1 is low, ce 2 is high and ce 3 is low. when ce is high, ce 1 is high or ce 2 is low or ce 3 is high. 24. order of the burst sequence is determined by the status of the mode (0 = linear, 1 = interleaved). burst operations are opti onal. write d(a1) 123 456789 clk t cyc t cl t ch 10 ce t ceh t ces we cen t cenh t cens bw x adv/ld t ah t as address a1 a2 a3 a4 a5 a6 a7 t dh t ds dq command t clz d(a1) d(a2) q(a4) q(a3) d(a2+1) t doh t chz t cdv write d(a2) burst write d(a2+1) read q(a3) read q(a4) burst read q(a4+1) write d(a5) read q(a6) write d(a7) deselect oe t oev t oelz t oehz don?t care undefined d(a5) t doh q(a4+1) d(a7) q(a6) [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 24 of 32 nop, stall and deselect cycles [25, 26, 27] notes 25. for this waveform zz is tied low. 26. when ce is low, ce 1 is low, ce 2 is high and ce 3 is low. when ce is high, ce 1 is high or ce 2 is low or ce 3 is high. 27. the ignore clock edge or stal l cycle (clock 3) illustrates cen being used to create a pause. a write is not performed during this cycle. switching waveforms (continued) write d(a1) 123 456789 clk t cyc t cl t ch 10 ce t ceh t ces we cen t cenh t cens bw x adv/ld t ah t as address a1 a2 a3 a4 a5 a6 a7 t dh t ds dq command t clz d(a1) d(a2) q(a4) q(a3) d(a2+1) t doh t chz t cdv write d(a2) burst write d(a2+1) read q(a3) read q(a4) burst read q(a4+1) write d(a5) read q(a6) write d(a7) deselect oe t oev t oelz t oehz don?t care undefined d(a5) t doh q(a4+1) d(a7) q(a6) [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 25 of 32 zz mode timing [28, 29] notes 28. device must be deselected when entering zz mode. see truth ta ble for all possible signal conditions to deselect the device. 29. dqs are in high z when exiting zz sleep mode. switching waveforms (continued) t zz i supply clk zz t zzrec all inputs (except zz) don?t care i ddzz t zzi t rzzi outputs (q) high-z deselect or read only [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 26 of 32 ordering information the following table contains only the list of parts that are cu rrently available. if you do not se e what you are looking for, c ontact your local sales representative. for more information, visit the cypress website at www.cypress.com and refer to the product summary page at http://www.cypre ss.com/products . cypress maintains a worldwide network of offices, solution center s, manufacturer?s representatives and distributors. to find th e office closest to you, visit us at http://www.cypress.com /go/datasheet/offices . speed (mhz) ordering code package diagram part and package type operating range 133 cy7c1355c-133axc 51-85050 100-pin thin quad flat pack (14 20 1.4 mm) pb-free commercial cy7c1357c-133axc 100 CY7C1355C-100BGC 51-85115 119-ball ball gr id array (14 22 2.4 mm) commercial cy7c1357c-100bzc 51-85180 165- ball fine-pitch ball grid array (13 15 1.4 mm) ordering code definitions temperature range: c = commercial package type: xx = ax or bg or bz ax = 100-pin tqfp (pb-free) bg = 119-ball bga bz = 165-ball fpbga speed grade (133 mhz / 100 mhz) process technology 90nm 135x = 1355 / 1357 1355 = ft, 256 kb 36 (9 mb) 1357 = ft, 512 kb 18 (9 mb) cy7c = cypress srams cy7c 135x c - xxx xx c [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 27 of 32 package diagrams 51-85050 *d 100-pin thin plastic quad flatpack (14 20 1.4 mm), 51-85050 [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 28 of 32 package diagrams (continued) 51-85115 *c 119-ball bga (14 22 2.4 mm), 51-85115 [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 29 of 32 package diagrams (continued) 51-85180 *c 165-ball fbga (13 15 1.4 mm), 51-85180 [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 30 of 32 acronyms document conventions units of measure acronym description bga ball grid array ce chip enable cen clock enable fpbga fine-pitch ball grid array jtag joint test action group nobl no bus latency oe output enable sel single event latchup tck test clock tdi test data input tms test mode select tdo test data output tqfp thin quad flat pack we write enable symbol unit of measure ns nano seconds vvolts a micro amperes ma milli amperes ms milli seconds mhz mega hertz pf pico farad wwatts c degree celcius [+] feedback
cy7c1355c, cy7c1357c document number: 38-05539 rev. *h page 31 of 32 document history page document title: cy7c1355c/cy7c1357c 9-mbit (256 k 36 / 512 k 18) flow-through sram with nobl? architecture document number: 38-05539 rev. ecn no. issue date orig. of change description of change ** 242032 see ecn rkf new data sheet *a 332059 see ecn pci changed boundary scan orde r to match the b rev of these devices removed description on extest output bus tri-state removed 117 mhz speed bin changed i ddzz from 35 ma to 50 ma on pg # 9 changed i sb1 and i sb3 from 40 ma to 110 and 100 ma respectively address expansion pins/balls in the pinouts for all packages are modified as per jedec standard modified v ol, v oh test conditions corrected i sb4 test condition from (v in v dd ? 0.3v or v in 0.3v) to (v in v ih or v in v il ) in the electrical characteristic table on pg #18 changed ja and jc for tqfp package from 25 and 9 c/w to 29.41 and 6.13 c/w respectively changed ja and jc for bga package from 25 and 6 c/w to 34.1 and 14.0 c/w respectively changed ja and jc for fbga package from 27 and 6 c/w to 16.8 and 3.0 c/w respectively added lead-free information for 100-pin tqfp, 119 bga and 165 fbga packages updated ordering information table changed from preliminary to final *b 351895 see ecn pci changed i sb2 from 30 to 40 ma updated ordering information table *c 377095 see ecn pci modified test condition in note# 14 from v ih < v dd to v ih < v dd *d 408298 see ecn rxu changed address of cypress se miconductor corporation on page# 1 from ?3901 north first street? to ?198 champion court? modified ?input load? to ?input leakage current except zz and mode? in the electrical characteristics table changed three-state to tri-state replaced package name column with package diagram in the ordering information table updated ordering information table *e 501793 see ecn vkn added the maximum rating for supply voltage on v ddq relative to gnd changed t th , t tl from 25 ns to 20 ns and t tdov from 5 ns to 10 ns in tap ac switching characteristics table. updated the ordering information table. *f 2896585 03/20/2010 njy removed obsolete parts from ordering information table. updated package diagram, data sheet template, and sales, solutions, and legal information section. *g 3032633 09/17/2010 njy updated ordering information and added ordering code definitions . added acronyms and units of measure . minor edits and updated in new template. *h 3210400 03/30/11 njy removed following pruned parts from ordering information table. cy7c1355c-133bgc cy7c1357c-100axc updated package diagram spec 51-85050 to *d. [+] feedback
document number: 38-05539 rev. *h revised april 1, 2011 page 32 of 32 nobl and no bus latency are trademarks of cypress semiconductor corporation. zbt is a trademark of integrated device technology , inc. all product and company names mentioned in this document are the trademarks of their respective holders cy7c1355c, cy7c1357c ? cypress semiconductor corporation, 2006-2011. the information contained herein is subject to change without notice. cypress s emiconductor corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a cypress product. nor does it convey or imply any license under patent or other rights. cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement wi th cypress. furthermore, cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. the inclusion of cypress products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies cypress against all charges. any source code (software and/or firmware) is owned by cypress semiconductor corporation (cypress) and is protected by and subj ect to worldwide patent protection (united states and foreign), united states copyright laws and internatio nal treaty provisions. cypress hereby grants to licensee a personal, non-exclusive, non-transferable license to copy, use, modify, create derivative works of, and compile the cypress source code and derivative works for the sole purpose of creating custom software and or firmware in su pport of licensee product to be used only in conjunction with a cypress integrated circuit as specified in the applicable agreement. any reproduction, modification, translation, compilation, or repre sentation of this source code except as specified above is prohibited without the express written permission of cypress. disclaimer: cypress makes no warranty of any kind, express or implied, with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. cypress reserves the right to make changes without further notice to t he materials described herein. cypress does not assume any liability arising out of the application or use of any product or circuit described herein. cypress does not authori ze its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. the inclusion of cypress? prod uct in a life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies cypress against all charges. use may be limited by and subject to the applicable cypress software license agreement. sales, solutions, and legal information worldwide sales and design support cypress maintains a worldwide network of offices, solution center s, manufacturer?s representative s, and distributors. to find t he office closest to you, visit us at cypress locations . products automotive cypress.co m/go/automotive clocks & buffers cypress.com/go/clocks interface cypress. com/go/interface lighting & power control cypress.com/go/powerpsoc cypress.com/go/plc memory cypress.com/go/memory optical & image sensing cypress.com/go/image psoc cypress.com/go/psoc touch sensing cyp ress.com/go/touch usb controllers cypress.com/go/usb wireless/rf cypress.com/go/wireless psoc solutions psoc.cypress.com/solutions psoc 1 | psoc 3 | psoc 5 [+] feedback

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