UPD7210C

www.DataSheet4U.com UPD7210C (1/3) IL08 N-MOS GENERAL PURPOSE INTERFACE BUS-INTERFACE CONTROLLER —TOP VIEW— 12 D0 D1 D2 D3 D4 D5 D6 D7 DIO1 DIO2 DIO3 DIO4 DIO5 DIO6 DIO7 DIO8 28 29 30 31 32 33 34 35 T/R1 OUT 1 T/R2 OUT 2 CK IN 3 RESET IN 4 T/R3 OUT 5 DMAREQ OUT 6 DMAACK IN 7 CS IN 8 RD IN 9 WR IN 10 INT OUT 11 D0 I/O 12 D1 I/O 13 D2 I/O 14 D3 I/O 15 D4 I/O 16 D5 I/O 17 D6 I/O 18 D7 I/O 19 20 GND VDD 40 39 EO1 I/O 38 NDAC I/O 37 NRFD I/O 36 DAV I/O 35 DIO8 I/O 34 DIO7 I/O 33 DIO6 I/O 32 DIO5 I/O 31 DIO4 I/O 30 DIO3 I/O 29 DIO2 I/O 28 DIO1 I/O 27 SRQ I/O 26 ATN I/O 25 REN I/O 24 IFC I/O 23 RS2 I/O 22 RS1 I/O 21 RS0 I/O 13 14 15 16 17 18 19 EOI NDAC NRFD DAV 3 SRQ ATN REN 21 22 23 RS0 RS1 RS2 T/R1 T/R2 7 8 9 10 DMAACK CS RD WR INT DMAREQ RESET 4 T/R3 IFC 39 38 37 36 27 26 25 24 1 2 5 11 6 www.DataSheet4U.com UPD7210C (2/3) INPUT CS DMAACK RD RS0 - RS2 WR : : : : : CHIP SELECT DMA ACKNOWLEDGE READ ENABLE REGISTER SELECT WRITE ENABLE OUTPUT DMAREQ : DMA REQUEST INT : INTERRUPT REQUEST T/R1 - T/R3 : TRANSMIT/RECEIVE CONTROL INPUT/OUTPUT ATN : ATTENTION D0 - D7 : DATA BUS DAV : DATA VALID DIO1 - DIO8 : DATA EOI : END OR IDENTIFY IFC : INTERFACE CLEAR NDAC : NOT DATA ACCEPTED NRED : NOT READY FOR DATA REN : REMOTE ENABLE SRQ : SERVICE REQUEST www.DataSheet4U.com UPD7210C (3/3) REGISTERS 12 - 19 D0 - D7 28 - 35 DIO1 - DIO8 DATA IN COMMAND PASS THROUGH MESSAGE DECODER 21 - 23 RS0 - RS2 CS RD WR DMAREQ DMAACK 8 9 10 6 7 BYTE OUT ADDRESS STATUS ADDRESS MODE INTERFACE ...