mitsubishi - Al Kossow's Bitsavers

MITSUBISHI MICROCOMPUTERSPCA8403MELPS 8·48 EV ALUTION BOARDDESCRIPTIONThe PCA8403 evaluation board is used as an evaluationboard for MELPS 8-48 B-bit microc()mputers.This board consists basically of the external ROM chip(M5L8039P·ll) and EPROM (M5L2732K), possessingequivalent functions to the masked ROM M5L8048-XXXPand M5L8049-XXXP. When creating the mask for adeveloped program, this board is suitable for programverification- and running tests.FEATURES• Board computer equivalent to the M5L8048-XXXP,M5L8049-XXXP.• Simple program modification using an EPROM• Connection to user's system socket by means of a 40-pinDIL plug• Built-in clock generator• Speed up of a CPU using the M5L2764K.CONFIGURATIONAs can be seen in the block diagram, the PCA8403 consistsof the following hardware:(1). Evaluation chip and peripheral circuitry(2) Program EPROM socket(3) EPROM power supply circuitThe board and user system can be connected by meansof an acce.ssory cable.SPECIFICATIONSTypeItem8-bit parallel processorSpecificationCPU M5 L8039 P-" (equivalent to Intel 8039)Cycle timeMemoryClock supplied by user system (maximum 11 MHz)Program memory: 4K bytes (M5L2732K)Data memory: 128 bytes (built-in M5L8039P-11)APPLICATIONSProgram and applications equipment development forMELPS 8-48 8-bit single-chip microcomputers.FUNCTIONThe evaluation chip (M5L8039P-11) outputs the value ofthe program counter and reads in instructions fromERROM and executes them.The board is equivalent in operation to a single-chipmicrocomputer.BLOCK DIAGRAMM5L8039P-ll1.·0InterruptsPower supplyConnector usedOuter dimensions8-bit parallel port x3Test pin ,,2INT pin5V ±5%, 600mA (max)40-pin DI L accessary plag50 (L) x 170 (W) x 35 (H) mmI+5V- EAPSEN2CLOCK Xl, X2 DBP1~I 4 PORT 2P2 UPPER ORDER 4 BITSUPPERORDER BITSTEST PIN T 1TEST PIN TOI8P1ALETo PORT 2UPPERORDER BITSTlPO WR~~1IOEADDRESSIN ADDRESS~LATCHROM DATA-r--'"t14DATA BUSPORTr--INPUTBUFFER-lIIALE1-1P2 LOWER ORDER 4 BITSPORT 2IINPUT BUFFER~T2 OUTP:T LATCHRD WRDATA BUSPORTOUTPUT r-LATCH~ DBIII7-26 • MITSUBISHI.... ELECTRIC