MCM44C64 View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

MCM44C64

1MB R4000 Secondary Cache Fast Static RAM Module Set

Motorola => Freescale 

WRITE CYCLE 2 (DCS or TCS Controlled, See Notes 1 and 2)

–12

Parameter

Symbol Min Max

Address Setup Time

tAVEL

0

—

A0 Setup Time

Address Valid to End of Write

tA0VEL

0

—

tAVEH

12

—

A0 Valid to End of Write

Data/Tag Enable to End of Write

tA0VEH

10

—

tELEH,

12

—

tELWH

Data Valid to End of Write

Data Hold Time

tDVEH

6

—

tEHDX

5

—

Write Recovery Time

tEHAX

5

—

Write Recovery Time – A0

tEHA0X

5

—

NOTES:

1. A write occurs during the overlap of DCS or TCS low and WE low.

2. Enable timings are the same for both DCS and TCS.

–15

Min Max

0

—

0

—

15

—

12

—

15

—

7

—

5

—

5

—

5

—

–17

Min Max Unit Notes

0

—

ns

0

—

ns

17

—

ns

14

—

ns

17

—

ns

8

—

ns

5

—

ns

5

—

ns

5

—

ns

A1 – A15

A0

DCS/TCS

(DATA/TAG ENABLE)

WE (WRITE ENABLE)

D (DATA IN)

Q (DATA OUT)

WRITE CYCLE 2

tAVEH

tA0VEH

tA0VEL

tAVEL

HIGH–Z

tELEH

tELWH

tEHAX

tEHA0X

tDVEH

DATA VALID

tEHDX

MOTOROLA FAST SRAM

MCM4464 SERIES

7

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