82C54 Datasheet (Intel Corporation) - CHMOS PROGRAMMABLE INTERVAL TIMER

82C54, CHMOS PROGRAMMABLE INTERVAL TIMER

Symbol DIP D7-D0 CLK 0 OUT 0 GATE 0 GND OUT 1 GATE 1 CLK 1 GATE 2 OUT 2 CLK 2 A1 A 0 1-8 9 10 11 12 13 14 15 16 17 18 20-19 Pin Number PLCC 2-9 10 12 13 14 16 17 18 19 20 21 23-22 I O I O I O I I I O I I Data Bidirectional tri-state data bus lines connected to system data bus Clock 0 Clock input of

82C54 CHMOS PROGRAMMABLE INTERVAL TIMER Y Compatible with all Intel and most other microprocessors High Speed ‘‘Zero Wait State’’ Operation with 8 MHz 8086 88 and 80186 188 Handles Inputs from DC 10 MHz for 82C54-2 Available in EXPRESS Standard Temperature Range Extended Temperature Range Y Y Three independent 16-bit counters Low Power CHMOS ICC e 10 mA 8 MHz Count frequency Completely TTL Compatible Six Programmable Counter Modes Binary or BCD counting Status Read Back Command Available in 2