VG4616321B View Datasheet(PDF) - Vanguard International Semiconductor
Part Name
Description
MFG CO.
'VG4616321B' PDF : 82 Pages View PDF
VIS
Preliminary
VG4616321B/VG4616322B
262,144x32x2-Bit
CMOS Synchronous Graphic RAM
Timing Waveforms
Figure 1. AC Parameters for Write Timing (Burst Length = 4, CAS Latency = 2)
T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
CKE
t
CH
t
CL
tCK2
tIS
tIS
tIH
CS
Begin Auto Precharge Begin Auto Precharge
Bank A
Bank B
tIS
RAS
CAS
WE
DSF
BS
A9
A0 ~ A8
tIH
RAx
RBx
RAy
tIS
RBx
CAx
RBx
CBx
RAy
CAy
RAz
RBy
RAz
RBy
DQM
DQ
Hi-Z
tRCD
tRC
tDAL
tIS
tIH
tWR tRP
Ax0 Ax1 Ax2 Ax3 Bx0 Bx1 Bx2 Bx3 Ay0 Ay1 Ay2 Ay3
tRRD
Activate
Command
Bank A
Write with
Activate Write with Activate
Write
Auto Precharge Command Auto Precharge Command Command
Command
Bank B
Command Bank A
Bank A
Bank A
Bank B
Precharge Activate
Command Command
Bank A
Bank A
Activate
Command
Bank B
Document:1G5-0145
Rev.1
Page 27
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