MPC2105C View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

MPC2105C

512KB and 1MB BurstRAM Secondary Cache Modules for PowerPC™ PReP/CHRP Platforms

Motorola => Freescale 

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

512KB and 1MB BurstRAM

Secondary Cache Modules for

PowerPC™ PReP/CHRP Platforms

The MPC2105C and the MPC2106C are designed to provide burstable, high

performance L2 cache for the PowerPC 60x microprocessor family in conformance

with the PowerPC Reference Platform (PReP) and the PowerPC Common Hardware

Reference Platform (CHRP) specifications.

The MPC2105C and MPC2106C utilize synchronous BurstRAMs. The modules

are configured as 64K x 72, and 128K x 72 bits in a 178 (89 x 2) pin DIMM format.

The MPC2105C uses four of the 3 V 64K x 18; the MPC2106C uses eight of the 3

V 64K x 18. For tag bits, a 5 V cache tag RAM configured as 16K x 12 for tag field plus

16K x 2 for valid and dirty status bits is used.

Bursts can be initiated with the ADS signal. Subsequent burst addresses are

generated internal to the BurstRAM by the CNTEN signal.

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

(CLKx) inputs. Eight write enables are provided for byte write control.

Presence detect pins are available for auto configuration of the cache control.

The module family pinout will support 5 V and 3.3 V components for a clear path

to lower voltage and power savings. Both power supplies must be connected.

All of these cache modules are plug and pin compatible with each other.

• PowerPC–style Burst Counter on Chip

• Flow–Through Data I/O

• Plug and Pin Compatibility

• Multiple Clock Pins for Reduced Loading

• All Cache Data and Tag I/Os are LVTTL (3.3 V) Compatible

• Three State Outputs

• Byte Write Capability

• Fast Module Clock Rates: Up to 66 MHz

• Fast SRAM Access Times: 10 ns for Tag RAM Match

9 ns for Data RAM

• Decoupling Capacitors for Each Fast Static RAM

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

• 178 Pin Card Edge Module

• Burndy Connector, Part Number: ELF178KSC–3Z50

Order this document

by MPC2105C/D

MPC2105C

MPC2106C

178–LEAD CARD EDGE

TOP VIEW

MPC2105C CASE 1132A–01

MPC2106C CASE 1132–01

1

24

25

47

48

89

The PowerPC name is a trademark of IBM Corp., used under license therefrom.

10/14/97

M© OMoTtoOroRla,OInLc.A19F97AST SRAM

MPC2105C•MPC2106C

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