MBL8259A-2 - Fujitsu

MBL8259A-2 NMOS PROGRAMMABLE INTERRUPT CONTROLLER

TABLE 1 - PIN DESCRIPTION Symbl Pin No. Type Vee 28 I GND 14 I CS 1 I WR 2 0 RD 3 I D 7 - Do 4-11 I/O CASo-CAS2 12,13,15 I/O SP/EN INT 16 I/O 17 0 IRo-IR7 18-25 I INTA Ao 26 I 27 I Name and Function Supply: +5V Supply. Ground Chip Select: A Iowan this pin enables RD and WR communication between the CPU and the MBl 8259A INT.

Features

CONTROL LOGIC READ/ WAITE LOGIC AO 05------' CAS 0 CAS 1 CASCADE BUFFER! COMPARATOR INTERNAL BUS IRO IR1 IR2 IR3 IR4 IR5 IR6 , -_ _.--~ IR7
• Trade Mark of Intel Corporation Portions Reprinted by permission of Intel Corporation © Intel Corporation, 1980 ,-272 IR7 IR6 IR5 IR4 IR2 IR1 IRO INT SP/EN CAS2 1111111111111111111111111111111111111111111111111111 FUJITSU MBL 8259A MBL 8259A-2 1111111111111111111111111111111111111111111111111111 PIN DESCRIPTION TABLE 1 - PIN DESCRIPTION Symbl Pin No. Type Vee 28 I GND 14 I CS 1 I WR 2 0 RD 3 I D 7 - Do 4-11 I/O CASo-CAS2 12.