MCM64PC32T View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

MCM64PC32T

256K/512K Pipelined BurstRAM Secondary Cache Module for Pentium

Motorola => Freescale 

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

Advance Information

256K/512K Pipelined BurstRAM™

Secondary Cache Module

for Pentium™

The MCM64PC32T (256K) and MCM64PC64T (512K) are designed to pro-

vide a burstable, high performance, L2 cache for the Pentium microprocessor in

conjunction with Intel’s Triton II chip set. The MCM64PC32T is configured as 32K

x 64 bits and the MCM64PC64T is configured as 64K x 64 bits. Both are pack-

aged in a 160 pin card edge memory module. Each module uses Motorola’s 3.3

V 32K x 32 BurstRAMs and one Motorola 3.3 V 32K x 8 FSRAM for the tag RAM.

Bursts can be initiated with either address status processor (ADSP) or cache

address status (CADS). Subsequent burst addresses are generated internal to

the BurstRAM by the cache burst advance (CADV) input pin.

Write cycles are internally self timed and are initiated by the rising edge of the

clock (CLK0) input. Eight write enables are provided for byte write control.

PD0 – PD3 map into the Triton II chip set for auto–configuration of the cache

control.

• Pentium–Style Burst Counter on Chip

• Pipelined Data Out

• 160 Pin Card Edge Module

• Address Pipeline Supported by ADSP Disabled with Ex

• All Cache Data and Tag I/Os are TTL Compatible

• Three State Outputs

• Byte Write Capability

• Fast Module Clock Rate: 66 MHz

• Fast SRAM Access Times:15 ns for Tag RAM

8 ns for Data RAMs

• 1.5 Cycle Deselect Data RAMs

• Decoupling Capacitors for Each Fast Static RAM

• High Quality Multi–Layer FR4 PWB with Separate Power and Ground

Planes

• Single 3.3 V +10%, – 5% Power Supply

• Burndy Connector, Part Number: CELP2X80SC3Z48

• Intel COAST 3.0 Option III Compliant

• Burst Order Select (BOSEL) Option

Order this document

by MCM64PC32T/D

MCM64PC32T

MCM64PC64T

160–LEAD CARD EDGE

CASE TBD, TOP VIEW

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BurstRAM is a trademark of Motorola.

Pentium is a trademark of Intel Corp.

This document contains information on a new product. Specifications and information herein are subject to change without notice.

1/22/97

M© OMoTtoOroRla,OInLc.A19F97AST SRAM

MCM64PC32T•MCM64PC64T

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