From: Jaap van Ganswijk To: Milt Entres Subject: Unknown CPU On 19951008 you wrote: >Your chip directory page is really nice - but - how about a >HD63B03YP CPU?. This chip has a 64 pins and a Hitachi logo on it. I found it in the Oct. 1986 Hitachi 4-/8-/16-Bit Microcomputer Selection Guide, which is our most recent. :-( On page 91: The HD6303Y is a CMOS 8-bit micro processing unit which contains a CPU compatible with the HD6301V1, 256 bytes of RAM, 24 parallel 1/0 Pins, Serial Communication Interface (SGI) and two timers. · FEATURES · Instruction Set Compatible with the HD6301V1 · 256 Bytes of RAM · 24 Parallel I/O Pins · Parallel Handshake Interface (Port 6) · Darlington Transistor Drive (Port 2, 6) · 16-bit ProgrammableTimer Input Capture Register x 1 Free Running Counter x 1 Output Compare Registers x 2 · 8-Bit Reloadable Timer External Event Counter Square Wave Generation · Serial Communication Interface (SCI) Asynchronous Mode (8 Transmit Formats, Hardware Parity) Clocked Synchronous Mode - Three Kinds of Memory Ready - Halt - Error Detection (Address Error, Op-code Error) - Interrupt - 3 External, 7 Internal - Maximum 65k Bytes Address Space - Low Power Dissipation Mode Sleep Standby (Hardware Set, Software Set) - Wide Operating Range Vcc = 3 to 5.5 (f = 0.1 to 0.5 MHz) Vcc = 5V +- 10% (f = 0.1 - 3 MH2) · Minimum instruction Cycle Time - HD6303Y ......... 1 us (f = 1 MHz) - HD63A03Y ....... 0.67 us (f = 1.5 MHz) - HD63B03Y ........0.5 us (f= 2.0 MHz) - HD63C03Y ....... 0.33 us (f= 3.0 MHz) >I would like to find the pin out. Pin Arrangement: 1 Vss 2 Xtal 3 EXtal 4 MP0 5 MP1 6 /res 7 /stby 8 /nmi 9..16 P20..P27 17..24 P50..P57 25..32 P60..P67 33 Vcc 34..41 A15..A8 42 Vss 43..50 A7..A0 51..58 D7..D0 59 BA 60 /LIR 61 R/W 62 /wr 63 /rd 64 E Hope this helps, Jaap