MB1422A Datasheet - Fujitsu

MB1422A DRAM Controller LSI

Type Pin Name and Function I Internal/External Refresh Select; This pin is used to select refresh mode, internal refresh or external refresh. If MODEO/RESET ~ "H", internal refresh mode is selected. If MODEO/RESET ~ "L", external refresh mode. The falling edge of MODEO/RESET resets the refre.

MB 1422A June 1986 Edition 1.0 DYNAMIC RAM CONTROLLER The Fujitsu MB 1422A is a high performance DRAM controller LSI. The MB 1422A controls address multiplexing, refresh timing and their arbitration, and realizes one chip DRAM peripheral controller. The MB 1422A is designed to easily interface 64K and 256K DRAM to the system based on the 8086 or 68000. The MB 1422A is fabricated in an advanced low-power Schottky TTL process. The device is housed in a plastic 42-pin Dual In-line-Package, 42 pin .

MB1422A-Fujitsu.pdf