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 15.3. Interleaved Column Write Cycle (Burst Length = 4, CAS Latency = 3)

CLK

CKE

CS

RAS

CAS

WE

DSF

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

t

CK3

BS

A9

RAx

RBw

A0 ~ A8

RAx

CAx RBw

CBw

CBx

CBy

CAy

CBz

DQM

DQ

Hi-Z

tRCD

tRRD > tRRD(min)

tWR

tRP

tWR (min)

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

Activate

Command

Bank A

Activate

Command

Bank B

Write

Command

Bank A

Write

Write

Command Command

Bank B

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 59

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