VG4616321B View Datasheet(PDF) - Vanguard International Semiconductor

Part Name

Description

MFG CO.

VG4616321B

CMOS Synchronous Graphic RAM

Vanguard International Semiconductor 

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VIS

Preliminary

VG4616321B/VG4616322B

262,144x32x2-Bit

CMOS Synchronous Graphic RAM

Figure 15.2. Interleaved Column Write Cycle (Burst Length = 4, CAS Latency = 2)

CLK

CKE

CS

RAS

CAS

WE

DSF

BS

A9

T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22

t

CK2

RAx

RBw

A0 ~ A8

RAx

CAx

RBw

CBw

CBx

CBy

CAy

CBz

DQM

DQ

Hi-Z

tRCD

tRRD

tRP

tWR

tRP

DAx0 DAx1 DAx2 DAx3 DBw0 DBw1 DBx0 DBx1 DBy0 DBy1 DAy0 DAy1 DBz0 DBz1 DBz2 DBz3

Activate

Command

Bank A

Write

Command

Bank A

Activate

Write

Command Command

Bank B Bank B

Write

Command

Bank B

Write

Command

Bank B

Write

Command

Bank A

Write

Command

Bank B

Precharge

Command

Bank A

Precharge

Command

Bank B

Document:1G5-0145

Rev.1

Page 58

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