1 of 17 rev: 121803 general description the DS21448DK is an easy-to-use evaluation board for the ds21448 quad e1/t1/j1 liu. it is intended to be used as a daughter card with the dk101 motherboard or the dk2000 motherboard. a surface- mounted ds21448 and careful layout of the analog signal traces provide maximum signal integrity to demonstrate the transmit and receive capabilities of the ds21448. the dk101/dk2000 motherboard and dallas? chipview software give point-and-click access to configuration and status registers from a windows -based pc. on-board leds indicate interrupt status and receive-carrier loss for all four ports. the evaluation board provides both rj45 and bnc connectors for the line-side transmit and receive differential pairs on all four ports. each DS21448DK is shipped with a free dk101 motherboard. for complex applications, the dk2000 high-performance demo kit motherboard can be purchased separately. windows is a registered trademark of microsoft corp. ordering information part description DS21448DK ds21448 design kit daughter card (with included dk101 motherboard) features demonstrates key functions of the ds21448 quad liu includes transformers, bnc, and rj45 network connectors and termination passives compatible with dk101 and dk2000 demo kit motherboards dk101/dk2000 and chipview software provide point-and-click access to the ds21448 register set memory-mapped fpga provides flexible clock and signal routing leds for receive-carrier loss and interrupt easy-to-read silk-screen labels identify the signals associated with all connectors, jumpers, and leds design kit contents DS21448DK design kit daughter card dk101 demo kit motherboard cd-rom chipview software DS21448DK data sheet ds21448 data sheet dk101 data sheet ds21448 errata sheet ds21448d k 3.3v e1/t1/j1 line interface design kit daughter card www.maxim-ic.com
DS21448DK 3.3v e1/t1/j1 line interface design kit 2 of 17 component list designation qty description supplier part 1 1 3.3v e1/t1/j1 line interface, 0c to +70c, 144-pin bga dallas semiconductor ds21448 c1, c2, c6, c10, c12, c22, c24 7 0.47 f, 25v, 10% ceramic capacitors (1206) digi-key pcc1891ct-nd c3?c5, c7, c8, c11, c21, c23, c25, c26 10 0.1 f, 16v, 10% ceramic capacitors (0603) digi-key 311-1088-1-nd c9 1 10 f, 16v, 20% tantalum capacitor (b case) digi-key pcs3106ct-nd c13?c16 4 0.1 f, 25v, 10% ceramic capacitors (1206) digi-key pcc1883ct-nd c17?c20 4 1 f, 16v, 10% ceramic capacitors (1206) digi-key pcc1882ct-nd ds1?ds5 5 led, red, smd digi-key p500ct-nd j1, j6?j13 9 connector bnc ra, 5-pin kruvand ucbjr220 j2 1 connector, 10-pin, dual row, vertical digi-key s2012-05-nd j3?j5 ? 8-row by 2-column pin strip, 0.1" centers, 0.025" post na lab stock j14 1 ra rj45, 8-pin, 4-port jack molex 43223-8140 j15, j16 2 socket, smd, 50-pin, dual row, vertical samtec tfm-125-02-s-d-lc r1?r16, r37?r41, r54?r57 25 0 , 1/8w, 5% resistors (1206) digi-key p0.0etr-nd r17, r20, r21, r25, r28?r36, r53 14 10k , 1/10w, 1% resistors (0805) digi-key p10.0kcct-nd r18, r19, r22?r24, r26, r27 7 51.1 , 1/10w, 1% resistors (0805) digi-key p51.1cct-nd r42, r43 2 1.0k , 1/10w, 1% resistors (0805) digi-key p1.00kcct-nd r44?r51 8 61.9 , 1/8w, 1% resistors (1206) digi-key p61.9fct-nd t1?t4 4 xfmr, dual, 16-pin smt pulse engineering tx1099 u1 1 xilinx cpld 72 macrocell, 100-pin tqfp, 3.3v avnet xc95142xl-10tq100c basic operation hardware configuration using the dk101 processor board connect the daughter card to the dk101 processor board. supply 3.3v to the banana-plug receptacles marked gnd and vcc_3.3v. (the external 5v connector is unused. additionally, the tim 5v supply headers are unused.) all processor-board dip switch settings should be in the on position with the exception of the flash- programming switch, which should be off. from the programs menu, launch the host application named chipview.exe. run the chipview application. if the default installation options were used, click the start button on the windows toolbar and select programs chipview chipview. using the dk2000 processor board connect the daughter card to the dk2000 processor board. connect j1 to the power supply that is delivered with the kit. alternately, a pc power supply can be connected to connector j2. from the programs menu, launch the host application named chipview.exe. run the chipview application. if the default installation options were used, click the start button on the windows toolbar and select programs chipview chipview.
DS21448DK 3.3v e1/t1/j1 line interface design kit 3 of 17 general upon power-up, the rcl leds are lit, and the int led is off. after power-up, the rcl leds extinguish upon external loopback. due to the dual winding transformer, only the 120 line build-out (lbo) configuration setting is needed to cover both 75 e1 and 120 e1. miscellaneous clock frequencies are provided by a register-mapped cpld, which is on the ds21448 daughter card. the definition file for this cpld is named DS21448DK02a0_cpld.def . see the cpld register map definitions. quick setup (register view) the pc loads the program, offering a choice between demo mode, register view, and terminal mode. select register view. the program requests a definition file. select DS21448DK02a0_cpld.def. the register view screen appears, showing the register names, acronyms, and values. note the cpld def file contains a link such that the def file for the ds21448 is also loaded. selection among the def files is accomplished using the drop-down box on the right-hand side of the program window. from the drop-down box, select the ds21448 def file and configure register ccr3 of ports 1 through 4 with a 90h. ? the device begins transmitting a pseudo-random bit sequence. upon external loopback, the rcl led extinguishes, denoting that the device has found a carrier and has successfully decoded the pseudorandom bit sequence. for more advanced configurations, please refer to the ds21448 data sheet.
DS21448DK 3.3v e1/t1/j1 line interface design kit 4 of 17 address map the dk101 daughter card address space begins at 0x81000000. the dk2000 daughter card address space begins at: 0x30000000 for slot 0 0x40000000 for slot 1 0x50000000 for slot 2 0x60000000 for slot 3 all offsets in the daughter card address map table are relative to the beginning of the daughter card address space. daughter card address map offset device function 0x0000 to 0x0015 cpld board id, clock and signal routing 0x2000 to 0x2015 liu port 1 0x3000 to 0x3015 liu port 2 0x4000 to 0x4015 liu port 3 0x5000 to 0x5015 liu port 4 board is populated with either the ds21q348 or the ds21448. please see the factory data sheet for details. registers in the cpld can be easily modified using chipview, a host-based user-interface software with the definition file named DS21448DK02a0_cpld.def. this file is included as part of the design kit documentation download (accessed through the ds21448?s quick view data sheet) or the included cd-rom. the definition file for the liu is named ds21448.def . cpld register map offset register type function 0x0000 bid read-only board id 0x0001 ? ? unused 0x0002 xbidh read-only high nibble extended board id 0x0003 xbidm read-only middle nibble extended board id 0x0004 xbidl read-only low nibble extended board id 0x0005 brev read-only board fab revision 0x0006 arev read-only board assembly revision 0x0007 prev read-only pld revision 0x0011 mclk_src read-write mc lk source register 0x0012 tclk1_src read-write tclk1 source register 0x0013 tclk2_src read-write tclk2 source register 0x0014 tclk3_src read-write tclk3 source register 0x0015 tclk4_src read-write tclk4 source register id registers offset name function 0x0000 bid board id. bid is read-only with a value of 0xd. 0x0002 xbidh high nibble extended board id. xbidh is read-only with a value of 0x00. 0x0003 xbidm middle nibble extended board id. xbidm is read-only with a value of 0x02. 0x0004 xbidl low nibble extended board id. xbidl is read-only with a value of 0x00. 0x0005 brev board fab revision. brev is read-only and displays the current fab revision. 0x0006 arev board assembly revision. arev is read-only and displays the assembly revision. 0x0007 prev pld revision. prev is read-only and disp lays the current pld firmware revision.
DS21448DK 3.3v e1/t1/j1 line interface design kit 5 of 17 control registers the control registers are used set the clock frequency on the mclk and tclk pins. options are 1.544mhz, 2.048mhz, external source (through aux clk bnc), and tri-state. mclk_src: mclk source (offset = 0x0011) initial value = 0x1 (msb) (lsb) ? ? ? ? hi_z extosc 2048mhz 1544mhz name position function hi_z mclk_src.3 1 = tri-state mclk. extosc mclk_src.2 1 = connect mclk to the external oscillator. 2048mhz mclk_src.1 1 = connect mclk to the 2.048mhz clock. 1544mhz mclk_src.0 1 = connect mclk to the 1.544mhz clock. tclk1_src: tclk source (offset = 0x0012) initial value = 0x1 (msb) (lsb) ? ? ? ? hi_z extosc 2048mhz 1544mhz name position function hi_z tclk1_src.3 1 = tri-state tclk1. extosc tclk1_src.2 1 = connect tclk1 to the external oscillator. 2048mhz tclk1_src.1 1 = connect tclk1 to the 2.048mhz clock. 1544mhz tclk1_src.0 1 = connect tclk1 to the 1.544mhz clock. tclk2_src: tclk source (offset = 0x0013) initial value = 0x1 (msb) (lsb) ? ? ? ? hi_z extosc 2048mhz 1544mhz name position function hi_z tclk2_src.3 1 = tri-state tclk2. extosc tclk2_src.2 1 = connect tclk2 to the external oscillator. 2048mhz tclk2_src.1 1 = connect tclk2 to the 2.048mhz clock. 1544mhz tclk2_src.0 1 = connect tclk2 to the 1.544mhz clock. tclk3_src: tclk source (offset = 0x0014) initial value = 0x1 (msb) (lsb) ? ? ? ? hi_z extosc 2048mhz 1544mhz name position function hi_z tclk3_src.3 1 = tri-state tclk3. extosc tclk3_src.2 1 = connect tclk3 to the external oscillator. 2048mhz tclk3_src.1 1 = connect tclk3 to the 2.048mhz clock. 1544mhz tclk3_src.0 1 = connect tclk3 to the 1.544mhz clock.
DS21448DK 3.3v e1/t1/j1 line interface design kit maxim/dallas semiconductor cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a ma xim/dallas semiconductor product. no circuit patent licenses are implied. maxim/dallas semiconductor reserves the right to change the circuitry and specification s without notice at any time. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ? 2003 maxim integrated products printed usa 6 of 17 tclk4_src: tclk source (offset = 0x0015) initial value = 0x1 (msb) (lsb) ? ? ? ? hi_z extosc 2048mhz 1544mhz name position function hi_z tclk4_src.3 1 = tri-state tclk4. extosc tclk4_src.2 1 = connect tclk4 to the external oscillator. 2048mhz tclk4_src.1 1 = connect tclk4 to the 2.048mhz clock. 1544mhz tclk4_src.0 1 = connect tclk4 to the 1.544mhz clock. ds21448 information for more information about the ds21448, please consult the ds21448 data sheet available on our website, www.maxim-ic.com/telecom . technical support for additional technical support, please email your questions to telecom.support@dalsemi.com . schematics the d21448dk schematics are featured in the following pages.
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