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- -1 - 184pin registered ddr sdram module rev. 0.1 dec. 2001 m383l2828ct1 1gb ddr sdram module registered 184pin dimm (128mx72 ((64mx72)*2)based on 64mx4 ddr sdram) 72-bit ecc/parity revision 0.1 dec. 2001
- 0 - 184pin registered ddr sdram module rev. 0.1 dec. 2001 m383l2828ct1 revision history revision 0.0 (august. 2000) 1. first release for internal usage. revision 0.1 (dec. 2001) - add derating values for the specifications if the single-ended clock skew rate is less than 1.0v/ns in page 47. - revised "absolute maximum rating" table in page 38. . changed "voltage on vddq supply relative to vss" value from -0.5~3.6v to -1~3.6v . changed "power dissipation" value from 1.0w to 1.5w. - revised ac parameter table - deleted typical current in idd spec. table - included address and control input setup/hold time(tis/tih) at slow slew rate in ddr200/266 ac specification - deleted exit self refresh to write command(txsw) in ddr200/266 ac specification - rename txsa(exit self refresh to bank active command) to txsnr(exit self refresh to non read command) at ddr200/266 - rename txsr(exit self refresh to read command) to txsrd at ddr200/266 - rename twpreh(dqs in hold time) to twpre at ddr200/266 - rename tref(refresh interval time) to trefi at ddr200/266 - changed twr value from 2tck to 15ns. --rename tcdlr(write data out to read command) t0 twtr - added tdal(twr+trp) from to ddr266a ddr266b ddr200 ddr266a ddr266b ddr200 min. max. min. max. min. max. min. max. min. max. min. max. thz tacmin -400ps tacmax -400ps tacmin -400ps tacmax -400ps tacmin -400ps tacmax -400ps -0.75 +0.75 -0.75 +0.75 -0.8 +0.8 tlz tacmin -400ps tacmax -400ps tacmin -400ps tacmax -400ps tacmin -400ps tacmax -400ps -0.75 +0.75 -0.75 +0.75 -0.8 +0.8 twpst (tck) 0.25 0.25 0.25 0.4 0.6 0.4 0.6 0.4 0.6 tpdex 10ns 10ns 10ns 7.5ns 7.5ns 10ns
- 1 - 184pin registered ddr sdram module rev. 0.1 dec. 2001 m383l2828ct1 pin configurations (front side/back side) pin front pin front pin front pin back pin back pin back 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 vref dq0 vss dq1 dqs0 dq2 vdd dq3 nc /reset vss dq8 dq9 dqs1 vddq *ck1 */ck1 vss dq10 dq11 cke0 vddq dq16 dq17 dqs2 vss a9 dq18 a7 vddq dq19 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 a5 dq24 vss dq25 dqs3 a4 vdd dq26 dq27 a2 vss a1 cb0 cb1 vdd dqs8 a0 cb2 vss cb3 ba1 dq32 vddq dq33 dqs4 dq34 vss ba0 dq35 dq40 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 vddq /we dq41 /cas vss dqs5 dq42 dq43 vdd */cs2 dq48 dq49 vss */ck2 *ck2 vddq dqs6 dq50 dq51 vss vddid dq56 dq57 vdd dqs7 dq58 dq59 vss nc sda scl 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 vss dq4 dq5 vddq dqs9 dq6 dq7 vss nc nc nc vddq dq12 dq13 dqs10 vdd dq14 dq15 cke1 vddq *ba2 dq20 a12 vss dq21 a11 dqs11 vdd dq22 a8 dq23 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 vss a6 dq28 dq29 vddq dqs12 a3 dq30 vss dq31 cb4 cb5 vddq ck0 /ck0 vss dqs17 a10 cb6 vddq cb7 vss dq36 dq37 vdd dqs13 dq38 dq39 vss dq44 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 /ras dq45 vddq /cs0 /cs1 dqs14 vss dq46 dq47 */cs3 vddq dq52 dq53 *a13 vdd dqs15 dq54 dq55 vddq nc dq60 dq61 vss dqs16 dq62 dq63 vddq sa0 sa1 sa2 vddspd the samsung m383l2828ct1 is 128m bit x 72 double data rate sdram high density memory modules. the samsung m383l2828ct1 consists of thirty-six cmos 64m x 4 bit with 4banks double data rate sdrams in 66pin tsop-ii(400mil) packages, mounted on a 184pin glass-epoxy substrate. four 0.1uf decoupling capacitors are mounted on the printed circuit board in parallel for each ddr sdram. the m383l2828ct1 is dual in-line memory modules and intend-ed for mounting into 184pin edge connector sockets. synchronous design allows precise cycle control with the use of system clock. data i/o transactions are possible on both edges of dqs. range of operating frequencies, programmable latencies and burst lengths allow the same device to be useful for a variety of high bandwidth, high performance memory sys- tem applications. general description pin description * these pins are not used in this module. pin name function a0 ~ a12 address input (multiplexed) ba0 ~ ba1 bank select address dq0 ~ dq63 data input/output cb0 ~ cb7 check bit(data-in/data-out) dqs0 ~ dqs17 data strobe input/output ck0, ck0 clock input cke0,cke1 clock enable input cs0 , cs1 chip select input ras row address strobe cas column address strobe we write enable vdd power supply (2.5v) vddq power supply for dqs(2.5v) vss ground vref power supply for reference vddspd serial eeprom power supply ( 2.3v to 3.6v ) sda serial data i/o scl serial clock sa0 ~ 2 address in eeprom vddid vdd identification flag reset reset enable nc no connection samsung electronics co., ltd. reserves the right to change products and specifications without notice. key key m383l2828ct1 ddr sdram 184pin dimm 128mx72 ddr sdram 184pin dimm based on stacked 64mx4, 4bank, 8k refresh with spd ? performance range ? power supply : vdd: 2.5v 0.2v, vddq: 2.5v 0.2v ? double-data-rate architecture; two data transfers per clock cycle ? bidirectional data strobe(dqs) ? differential clock inputs(ck and ck ) ? dll aligns dq and dqs transition with ck transition ? programmable read latency 2, 2.5 (clock) ? programmable burst length (2, 4, 8) ? programmable burst type (sequential & interleave) ? edge aligned data output, center aligned data input ? auto & self refresh, 7.8us refresh interval(8k/64ms refresh) ? serial presence detect with eeprom ? pcb : height 1700 mil , double sided component part no. max freq. interface m383l2828ct1-c(l)a2 133mhz(7.5ns@cl=2) sstl_2 m383l2828ct1-c(l)b0 133mhz(7.5ns@cl=2.5) m383l2828ct1-c(l)a0 100mhz(10ns@cl=2) feature
- 2 - 184pin registered ddr sdram module rev. 0.1 dec. 2001 m383l2828ct1 functional block diagram dq4 dq5 dq6 dq7 dq0 dq1 dq2 dq3 dqs0 dq12 dq13 dq14 dq8 dq9 dq10 dq11 dm0/dqs9 dq20 dq21 dq22 dq23 dq16 dq17 dq18 dq19 dm2/dqs11 dq28 dq29 dq30 dq31 dq24 dq25 dq26 dq27 dm3/dqs12 dq36 dq37 dq38 dq39 dq32 dq33 dq34 dq35 dm4/dqs13 dq44 dq45 dq46 dq47 dq40 dq41 dq42 dq43 dm5/dqs14 dq52 dq53 dq54 dq55 dq48 dq49 dq50 dq51 dq60 dq61 dq62 dq63 dq56 dq57 dq58 dq59 dm7/dqs16 rs 0 rs 1 dqs4 dqs1 dqs5 dqs2 dqs3 dm6/dqs15 dqs6 dqs7 dq15 dqs i/o 3 i/o 2 i/o 1 i/o 0 d0 s dm dqs i/o 3 i/o 2 i/o 1 i/o 0 d1 s dm dqs i/o 3 i/o 2 i/o 1 i/o 0 d2 s dm dqs i/o 3 i/o 2 i/o 1 i/o 0 d3 s dm dqs i/o 3 i/o 2 i/o 1 i/o 0 d4 s dm dqs i/o 3 i/o 2 i/o 1 i/o 0 d5 s dm dqs i/o 3 i/o 2 i/o 1 i/o 0 d6 s dm dqs i/o 3 i/o 2 i/o 1 i/o 0 d7 s dm dqs i/o 0 i/o 1 i/o 2 i/o 3 d9 s dm dqs i/o 0 i/o 1 i/o 2 i/o 3 d10 s dm dqs i/o 0 i/o 1 i/o 2 i/o 3 d11 s dm dqs i/o 0 i/o 1 i/o 2 i/o 3 d12 s dm dqs i/o 0 i/o 1 i/o 2 i/o 3 d13 s dm dqs i/o 0 i/o 1 i/o 2 i/o 3 d14 s dm dqs i/o 0 i/o 1 i/o 2 i/o 3 d15 s dm dqs i/o 0 i/o 1 i/o 2 i/o 3 d16 s dm dm1/dqs10 v ss dqs i/o 3 i/o 2 i/o 1 i/o 0 d18 s dm dqs i/o 3 i/o 2 i/o 1 i/o 0 d19 s dm dqs i/o 3 i/o 2 i/o 1 i/o 0 d20 s dm dqs i/o 3 i/o 2 i/o 1 i/o 0 d21 s dm dqs i/o 3 i/o 2 i/o 1 i/o 0 d22 s dm dqs i/o 3 i/o 2 i/o 1 i/o 0 d23 s dm dqs i/o 3 i/o 2 i/o 1 i/o 0 d24 s dm dqs i/o 3 i/o 2 i/o 1 i/o 0 d25 s dm dqs i/o 0 i/o 1 i/o 2 i/o 3 d27 s dm dqs i/o 0 i/o 1 i/o 2 i/o 3 d28 s dm dqs i/o 0 i/o 1 i/o 2 i/o 3 d29 s dm dqs i/o 0 i/o 1 i/o 2 i/o 3 d30 s dm dqs i/o 0 i/o 1 i/o 2 i/o 3 d31 s dm dqs i/o 0 i/o 1 i/o 2 i/o 3 d32 s dm dqs i/o 0 i/o 1 i/o 2 i/o 3 d33 s dm dqs i/o 0 i/o 1 i/o 2 i/o 3 d34 s dm notes: 1. dq-to-i/o wiring is shown as recommended but may be changed. 2. dq/dqs/dm/cke/ cs relationships must be maintained as shown. 3. dq, dqs, dm/dqs resistors: 22 ohms. ra0 - ra12 a0-an: sdrams d0 - d35 ras : sdrams d0 - d35 rcas cas : sdrams d0 - d35 rcke1 cke: sdrams d18 - d35 pck we : sdrams d0 - d35 rcke0 rba0 - rban ba0-ban: sdrams d0 - d35 ras cas cke0 cke1 rcs1 cs1 ba0-ban a0-a12 r e g i s t e r rras rwe cs0 rcs0 we pck reset cke: sdrams d0 - d17 pll ck0, ck0 a0 serial pd a1 a2 sa0 sa1 sa2 scl sda wp v ss d0 - d35 d0 - d35 v dd /v ddq d0 - d35 d0 - d35 vref v ddspd spd cb0 cb1 cb2 cb3 dqs8 dqs i/o 3 i/o 2 i/o 1 i/o 0 d8 s dm dqs i/o 3 i/o 2 i/o 1 i/o 0 d26 s dm cb4 cb5 cb6 cb7 dm8/dqs17 dqs i/o 3 i/o 2 i/o 1 i/o 0 d17 s dm dqs i/o 3 i/o 2 i/o 1 i/o 0 d35 s dm
- 3 - 184pin registered ddr sdram module rev. 0.1 dec. 2001 m383l2828ct1 notes 1. includes 25mv margin for dc offset on v ref , and a combined total of 50mv margin for all ac noise and dc offset on v ref , bandwidth limited to 20mhz. the dram must accommodate dram current spikes on v ref and internal dram noise coupled to v ref , both of which may result in v ref noise. v ref should be de-coupled with an inductance of 3nh. 2.v tt is not applied directly to the device. v tt is a system supply for signal termination resistors, is expected to be set equal to v ref , and must track variations in the dc level of v ref 3. v id is the magnitude of the difference between the input level on ck and the input level on ck . 4. these parameters should be tested at the pin on actual components and may be checked at either the pin or the pad in simulation. the ac and dc input specifications are relative to a vref envelop that has been bandwidth limited to 200mhz. 5. the value of v ix is expected to equal 0.5*v ddq of the transmitting device and must track variations in the dc level of the same. 6. these charactericteristics obey the sstl-2 class ii standards. recommended operating conditions(voltage referenced to v ss =0v, t a =0 to 70 c) parameter symbol min max unit note supply voltage(for device with a nominal v dd of 2.5v) v dd 2.3 2.7 i/o supply voltage v ddq 2.3 2.7 v i/o reference voltage v ref vddq/2-50mv vddq/2+50mv v 1 i/o termination voltage(system) v tt v ref -0.04 v ref +0.04 v 2 input logic high voltage v ih (dc) v ref +0.15 v ddq +0.3 v 4 input logic low voltage v il (dc) -0.3 v ref -0.15 v 4 input voltage level, ck and ck inputs v in (dc) -0.3 v ddq +0.3 v input differential voltage, ck and ck inputs v id (dc) 0.3 v ddq +0.6 v 3 input crossing point voltage, ck and ck inputs v ix (dc) 1.15 1.35 v 5 input leakage current i i -2 2 ua output leakage current i oz -5 5 ua output high current(normal strengh driver) ;v out = v tt + 0.84v i oh -16.8 ma output high current(normal strengh driver) ;v out = v tt - 0.84v i ol 16.8 ma output high current(half strengh driver) ;v out = v tt + 0.45v i oh -9 ma output high current(half strengh driver) ;v out = v tt - 0.45v i ol 9 ma power & dc operating conditions (sstl_2 in/out) note : permanent device damage may occur if absolute maximum ratings are exceeded. functional operation should be restricted to recommended operating condition. exposure to higher than recommended voltage for extended periods of time could affect device reliability. parameter symbol value unit voltage on any pin relative to v ss v in , v out -0.5 ~ 3.6 v voltage on v dd & v ddq supply relative to v ss v dd , v ddq -1.0 ~ 3.6 v storage temperature t stg -55 ~ +150 c power dissipation p d 54 w short circuit current i os 50 ma absolute maximum rate
- 4 - 184pin registered ddr sdram module rev. 0.1 dec. 2001 m383l2828ct1 ddr sdram i dd spec table * module i dd was calculated on the basis of component i dd and can be differently measured according to dq loading cap. symbol a2(ddr266@cl=2) b0(ddr266@cl=2.5) a0(ddr200@cl=2) unit notes idd0 3560 3560 3260 ma idd1 4170 4170 3660 ma idd2p 1180 1180 1180 ma idd2f 1700 1700 1660 ma idd2q 1980 1980 1900 ma idd3p 2210 2210 2050 ma idd3n 2850 2850 2570 ma idd4r 4170 4170 3700 ma idd4w 4450 4450 3820 ma idd5 5000 5000 4610 ma idd6 1220 1220 1220 ma idd6 low power 1160 1160 1160 ma optional idd7a 6750 6750 5920 ma for the i dd spec of a ddr sdram module with 2 rows, samsung defines the test condition of each row as below: test (condition) 1 row (active) 2 row (stand by) idd0 idd3n idd1 idd3n idd2p idd2p idd2f idd2f idd2q idd2q idd3p idd3p idd3n idd3n idd4r idd3n idd4w idd3n idd5 idd3n idd6 idd6 idd7 idd3n
- 5 - 184pin registered ddr sdram module rev. 0.1 dec. 2001 m383l2828ct1 input/output capacitance (v dd =2.5, v ddq =2.5v, t a = 25 c , f=1mhz) parameter symbol min max unit input capacitance(a0 ~ a12, ba0 ~ ba1, ras , cas , we ) cin1 6 8 pf input capacitance(cke0 ,cke1) cin2 5 7 pf input capacitance( cs 0, cs 1) cin3 5 7 pf input capacitance( clk0, /clk0) cin4 8 10 pf input capacitance(dm0~dm8) cin5 12 14 pf data & dqs input/output capacitance(dq0~dq63) cout1 12 14 pf data input/output capacitance(cb0~cb7) cout2 12 14 pf output load circuit (sstl_2) output z0=50 w c load =30pf v ref =0.5*v ddq r t =50 w v tt =0.5*v ddq ac operating test conditions (v dd =2.5v, v ddq =2.5v, t a = 0 to 70 c ) parameter value unit note input reference voltage for clock 0.5 * vddq v input signal maximum peak swing 1.5 v input levels(vih/vil) vref+0.31/vref-0.31 v input timing measurement reference level vref v output timing measurement reference level vtt v output load condition see load circuit ac operating conditions parameter/condition symbol min max unit note input high (logic 1) voltage, dq, dqs and dm signals vih(ac) vref + 0.31 v 3 input low (logic 0) voltage, dq, dqs and dm signals. vil(ac) vref - 0.31 v 3 input differential voltage, ck and ck inputs vid(ac) 0.7 vddq+0.6 v 1 input crossing point voltage, ck and ck inputs vix(ac) 0.5*vddq-0.2 0.5*vddq+0.2 v 2 note 1. vid is the magnitude of the difference between the input level on ck and the input on ck . 2. the value of v ix is expected to equal 0.5*v ddq of the transmitting device and must track variations in the dc level of the same. 3. these parameters should be tested at the pim on actual components and may be checked at either the pin or the pad in simula - tion. the ac and dc input specificatims are refation to a vref envelope that has been bandwidth limited 20mhz.
- 6 - 184pin registered ddr sdram module rev. 0.1 dec. 2001 m383l2828ct1 ac timming parameters & specifications (these ac charicteristics were tested on the component) parameter symbol -tca2 (ddr266a) -tcb0 (ddr266b) -tca0 (ddr200) unit note min max min max min max row cycle time trc 65 65 70 ns refresh row cycle time trfc 75 75 80 ns row active time tras 45 120k 45 120k 48 120k ns ras to cas delay trcd 20 20 20 ns row precharge time trp 20 20 20 ns row active to row active delay trrd 15 15 15 ns write recovery time twr 15 15 15 ns last data in to read command twtr 1 1 1 tck col. address to col. address delay tccd 1 1 1 tck clock cycle time cl=2.0 tck 7.5 12 10 12 10 12 ns 5 cl=2.5 7.5 12 7.5 12 ns 5 clock high level width tch 0.45 0.55 0.45 0.55 0.45 0.55 tck clock low level width tcl 0.45 0.55 0.45 0.55 0.45 0.55 tck dqs-out access time from ck/ ck tdqsck -0.75 +0.75 -0.75 +0.75 -0.8 +0.8 ns output data access time from ck/ ck tac -0.75 +0.75 -0.75 +0.75 -0.8 +0.8 ns data strobe edge to ouput data edge tdqsq - 0.5 - 0.5 - 0.6 ns 5 read preamble trpre 0.9 1.1 0.9 1.1 0.9 1.1 tck read postamble trpst 0.4 0.6 0.4 0.6 0.4 0.6 tck ck to valid dqs-in tdqss 0.75 1.25 0.75 1.25 0.75 1.25 tck dqs-in setup time twpres 0 0 0 ns 2 dqs-in hold time twpre 0.25 0.25 0.25 tck dqs falling edge to ck rising-setup time tdss 0.2 0.2 0.2 tck dqs falling edge from ck rising-hold time tdsh 0.2 0.2 0.2 tck dqs-in high level width tdqsh 0.35 0.35 0.35 tck dqs-in low level width tdqsl 0.35 0.35 0.35 tck dqs-in cycle time tdsc 0.9 1.1 0.9 1.1 0.9 1.1 tck address and control input setup time(fast) tis 0.9 0.9 1.1 ns 6 address and control input hold time(fast) tih 0.9 0.9 1.1 ns 6 address and control input setup time(slow) tis 1.0 1.0 1.1 ns 6 address and control input hold time(slow) tih 1.0 1.0 1.1 ns 6 data-out high impedence time from ck/ ck thz -0.75 +0.75 -0.75 +0.75 -0.8 +0.8 ns data-out low impedence time from ck/ ck tlz -0.75 +0.75 -0.75 +0.75 -0.8 +0.8 ns input slew rate(for input only pins) tsl(i) 0.5 0.5 0.5 v/ns 6 input slew rate(for i/o pins) tsl(io) 0.5 0.5 0.5 v/ns 7 output slew rate(x4,x8) tsl(o) 1.0 4.5 1.0 4.5 1.0 4.5 v/ns 10 output slew rate matching ratio(rise to fall) tslmr 0.67 1.5 0.67 1.5 0.67 1.5
- 7 - 184pin registered ddr sdram module rev. 0.1 dec. 2001 m383l2828ct1 1. maximum burst refresh cycle : 8 2. the specific requirement is that dqs be valid(high or low) on or before this ck edge. the case shown(dqs going from high_z to logic low) applies when no writes were previously in progress on the bus. if a previous write was in progress, dqs could be high at this time, depending on tdqss. 3. the maximum limit for this parameter is not a device limit. the device will operate with a great value for this parameter, but system performance (bus turnaround) will degrade accordingly. 4. a write command can be applied with t rcd satisfied after this command. 5. for registered dimms, t cl and t ch are 3 45% of the period including both the half period jitter (t jit(hp) ) of the pll and the half period jitter due to crosstalk (t jit (crosstalk) ) on the dimm. 6. input setup/hold slew rate derating this derating table is used to increase t is /t ih in the case where the input slew rate is below 0.5v/ns. input setup/hold slew rate based on the lesser of ac-ac slew rate and dc-dc slew rate. 7. i/o setup/hold slew rate derating this derating table is used to increase t ds /t dh in the case where the i/o slew rate is below 0.5v/ns. i/o setup/hold slew rate based on the lesser of ac-ac slew rate and dc-dc slew rate. parameter symbol -tca2 (ddr266a) -tcb0 (ddr266b) -tca0 (ddr200) unit note min max min max min max mode register set cycle time tmrd 15 15 16 ns dq & dm setup time to dqs tds 0.5 0.5 0.6 ns 7,8,9 dq & dm hold time to dqs tdh 0.5 0.5 0.6 ns 7,8,9 control & address input pulse width tipw 2.2 2.2 2.5 ns dq & dm input pulse width tdipw 1.75 1.75 2 ns power down exit time tpdex 7.5 7.5 10 ns exit self refresh to non-read command txsnr 75 75 80 ns 4 exit self refresh to read command txsrd 200 200 200 tck refresh interval time trefi 7.8 7.8 7.8 us 1 output dqs valid window tqh thp -tqhs - thp -tqhs - thp -tqhs - ns 5 clock half period thp tclmin or tchmin - tclmin or tchmin - tclmin or tchmin - ns data hold skew factor tqhs 0.75 0.75 0.8 ns dqs write postamble time twpst 0.4 0.6 0.4 0.6 0.4 0.6 tck 3 active to read with auto precharge command trap 20 20 20 autoprecharge write recovery + precharge time tdal (twr/tck) + (trp/tck) (twr/tck) + (trp/tck) (twr/tck) + (trp/tck) tck 11 input setup/hold slew rate d tis d tih (v/ns) (ps) (ps) 0.5 0 0 0.4 +50 +50 0.3 +100 +100 i/o setup/hold slew rate d tds d tdh (v/ns) (ps) (ps) 0.5 0 0 0.4 +75 +75 0.3 +150 +150
- 8 - 184pin registered ddr sdram module rev. 0.1 dec. 2001 m383l2828ct1 8. i/o setup/hold plateau derating this derating table is used to increase tds/tdh in the case where the input level is flat below vref 310mv for a duration of up to 2ns. 9. i/o delta rise/fall rate(1/slew-rate) derating this derating table is used to increase t ds /t dh in the case where the dq and dqs slew rates differ. the delta rise/fall rate is calated as 1/slewrate1-1/slewrate2. for example, if slew rate 1 = 5v/ns and slew rate 2 =.4v/ns then the delta rise/fall rate =-0/5ns/v. input s/h slew rate based on larger of ac-ac delta rise/fall rate and dc-dc delta rise/fall rate. 10. this parameter is fir system simulation purpose. it is guranteed by design. 11. for each of the terms, if not already an integer, round to the next highest integer. tck is actual to the system clock cyc le time. i/o input level d tds d tdh (mv) (ps) (ps) 280 +50 +50 delta rise/fall rate d tds d tdh (ns/v) (ps) (ps) 0 0 0 0.25 +50 +50 0.5 +100 +100 the following table specifies derating values for the specifications listed if the single-ended clock skew rate is less than 1.0 v/ns. ck slew rate (single ended) d tih/tis (ps) d tdss/tdsh (ps) d tac/tdqsck (ps) d tlz(min) (ps) d thz(max) (ps) 1.0v/ns 0 0 0 0 0 0.75v/ns +50 +50 +50 -50 +50 0.5v/ns +100 +100 +100 -100 +100
- 9 - 184pin registered ddr sdram module rev. 0.1 dec. 2001 m383l2828ct1 command truth table (v=valid, x=don t care, h=logic high, l=logic low) command cken-1 cken cs ras cas we ba 0,1 a 10 /ap a 11, a 12 a 9 ~ a 0 note register extended mrs h x l l l l op code 1, 2 register mode register set h x l l l l op code 1, 2 refresh auto refresh h h l l l h x 3 self refresh entry l 3 exit l h l h h h x 3 h x x x 3 bank active & row addr. h x l l h h v row address read & column address auto precharge disable h x l h l h v l column address a 0 ~a 9 ,a 11 4 auto precharge enable h 4 write & column address auto precharge disable h x l h l l v l column address a 0 ~a 9 ,a 11 4 auto precharge enable h 4, 6 burst stop h x l h h l x 7 precharge bank selection h x l l h l v l x all banks x h 5 active power down entry h l h x x x x l v v v exit l h x x x x precharge power down mode entry h l h x x x x l h h h exit l h h x x x l v v v dm h x x 8 no operation (nop) : not defined h x h x x x x 9 l h h h 9 note : 1. op code : operand code. a 0 ~ a 12 & ba 0 ~ ba 1 : program keys. (@emrs/mrs) 2. emrs/ mrs can be issued only at all banks precharge state. a new command can be issued 2 clock cycles after emrs or mrs. 3. auto refresh functions are same as the cbr refresh of dram. the automatical precharge without row precharge command is meant by "auto". auto/self refresh can be issued only at all banks precharge state. 4. ba 0 ~ ba 1 : bank select addresses. if both ba 0 and ba 1 are "low" at read, write, row active and precharge, bank a is selected. if ba 0 is "high" and ba 1 is "low" at read, write, row active and precharge, bank b is selected. if ba 0 is "low" and ba 1 is "high" at read, write, row active and precharge, bank c is selected. if both ba 0 and ba 1 are "high" at read, write, row active and precharge, bank d is selected. 5. if a 10 /ap is "high" at row precharge, ba 0 and ba 1 are ignored and all banks are selected. 6. during burst write with auto precharge, new read/write command can not be issued. another bank read/write command can be issued after the end of burst. new row active of the associated bank can be issued at t rp after the end of burst. 7. burst stop command is valid at every burst length. 8. dm sampled at the rising and falling edges of the dqs and data-in are masked at the both edges (write dm latency is 0). 9. this combination is not defined for any function, which means "no operation(nop)" in ddr sdram.
- 10 184pin registered ddr sdram module rev. 0.1 dec. 2001 m383l2828ct1 package dimensions units : inches (millimeters) tolerances : 0.005(.13) unless otherwise specified the used device is 64mx4 sdram, 66tsopii sdram part no : k4h510638c 0.050 0.0078 0.006 (0.20 0.15) (1.270 ) 0 . 1 0 0 ( 2 . 5 0 ) detail b 0.250 (6.350 ) detail a 0.157 (4.00 ) 0.071 (1.8 0) 0.039 0.002 (1.000 0. 050) (3.80) (6.62) 0.26 0.1496 (3.00) 0.118 r (2.00) 0.0787 (4.00) 0.1575 0.10 m c a b m a b reg pll reg a b 5.25 0.005 5.171 (131.350) (133.350 0.13) ( 4 3 . 3 3 ) 1 . 7 5.077 (128.950) 0 . 3 9 3 ( 1 0 . 0 0 ) 0 . 1 0 0 m i n ( 2 . 3 0 m i n ) (19.80) 0.78 ( 1 7 . 8 0 ) 0 . 7 2.500 0.10 m c b a 0.268 max 0.050 0.0039 (1.270 0.10) (6.81 max) ( 4 . 2 4 ) ( 0 . 1 6 7 ) 2.175 (3.00) 0.118 r (2.00) 0.0787
- 11 184pin registered ddr sdram module rev. 0.1 dec. 2001 m383l2828ct1 0ns (nominal) r=240 w sdram pll l7 reg2 r=240 w l6 r=120 w out1 out ?n? 120 w 120 w ck0 ck0 feedback notes* : 1. the clock delay from the input of the pll clock to the input of any sdram or register will be set to 0ns(nominal). 2. input,output, and feedback clock lines are terminated from line to leine as shown, and not from line to ground. 3. only one pll output is shown per output type. any addtional pll outputs will be wired in a similar maner. 4. termination resistors for the pll feedback path clocks are loacted after the pins of the pll. reg1 184 pin ddr registered dimm clock topolgy note * stack sdram stack z 0 =60 w clock reference net 1.0 probe point td=2.2ns/ft note : lenghts in inches 0.266 1.5pf 128 w

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