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
Figure 19.1 Full Page Write Cycle (Burst Length = Full Page, CAS Latency = 1)
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 High
t
CK1
CS
RAS
CAS
WE
DSF
BS
A9
RAx
RBx
RBy
A0 ~ A8
RAx CAx RBx
CBx
RBy
DQM
DQ Hi-Z
DAx DAx+1 DAx+2 DAx+3 DAx-1 DAx DAx+1 DBx DBx+1 DBx+2 DBx+3 DBx+4 DBx+5 DBx+6 DBx+7
Activate Activate
Write
Command Command
Command
Bank A Bank B
Bank B
The burst counter wraps
Write
Command
from the highest order
page address back to zero
during this time interval
Bank A
Full Page burst operation does
not terminate when the burst
length is satisfied;the burst counter
increments and continues bursting
beginning with the starting address
Document:1G5-0145
Rev.1
Data is
ignored
Precharge
Command
Bank B
Burst Stop
Command
Activate
Command
Bank B
Page 69
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