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MOTOROLA
• SEMICONDUCTOR
TECHNICAL DATA
Advance Information 128KB/256KB/512KB
Secondary Cache Module
With Tag, Valid, and Dirty for 486 Processor Based Systems
MCM32AB32 MCM32AB64 MCM32AB128
The MCM32AB32SG, MCM32AB64SG, and MCM32AB128 are a family of
Motorola's asynchronous secondary cache modules for the 486 processor. This family
is suited for the Intel 82420 PCI chipset. The modules are configured with 32 bit data,
7 bit tag, valid and a dirty bit for cache writeback. The family supports three cache
sizes of the 486 processor.
The MCM32AB32SG is a 128KB single bank cache of 32K x 32. The tag/valid is
8K x 8, and the Dirty bit is 8K x 1.
The MCM32AB64SG is a 256KB double bank cache of 64K x 32. The tag/valid is
16K x 8 and the Dirty bit is 16K x 1.
MCM32AB128 Datasheet
