mitsubishi - Al Kossow's Bitsavers

MITSUBISHI MICROCOMPUTERSMSM80S0H-XXXP/MSM8040HPSINGLE-CHIP a-BIT MICROCOMPUTERDESCRIPTIONThe M5M8050H-XXXP/M5M8040HP is an 8-bit parallel microcomputerfabricated on a single chip using N-channel silicongate EO-MOS technology.M5M8050H-XXXPM5M8040HPInternal ROM Type (4K Bytes)External ROM TypeFEATURES• Single 5V power supply• Instruction cycle .. . . . . . . . . . . . . . . . .. 1. 36,us (min)• Basic machine instructions .. 96 (1-byte instructions: 68)• 4K-bytes memory addressing possible(direct addressing possible in 2K bytes memory)• Memory capacity: ROM. . . . . . . . . . . . . .. 4K bytesRAM. . . . . . . . . . . . . .. 256 bytes• Built-in timer/event counter ................. 8 bits• I/O ports .............................. 27 lines• Easily expandable Memory and I/O• Subroutine nesting ...................... 81evels• External and timer/event counter interrupt, 1 level each• Low power standby modeAPPLICATIONControl processor or CPU for a wide variety of applicationsPIN CONFIGURATION (TOP VIEW)CLOCK INPUT 2 Xz -+ 3RESET INPUTAESET-+ 4SINGLE·STEP INPUT SS-+ 5REQJ~~-i~~~~i INT -+ 6EXTERNA'L ACCESS EA -+ 7READ AD +- 8STOR~R?NGfB1~ PSEN+- 9WRITE WA +- 10ADDRESSE~~1I.~ ALE +- 11DATtI BUS( 0 V) VssVee (SV)39 ... TI TEST PIN 138 .. P2 7 }3 7 .. P2 61/0 PORT 236 .. P2535 .. P2 4Zs" P1 1ZJ.. Plo'--____ --Jr Ẕ -' .. P 2 0Outline 40P41/0 PORT 1Z6 VDD (SV)Z5 ~PAOG ~/;TERNALZ4.. P2 3} CONTROLOUTPUTZ3 .. P2z 1/0 PORT 22l "P21FUNCTIONThe M5M8050H-XXXP/M5M8040HP is. an 8-bit CPU, withmemory (ROM, RAM) and timer/event counter interrupt allcontained a single chip.,,--BLOCKDIAGRAMRO REGISTER 0RI. REGISTER IR2 REGISTER 2 0R3 REGISTER 3 :.