VG36128401BT / VG36128801BT / VG36128161BT
CMOS Synchronous Dynamic RAM
VIS
AC Parameters for Write Timing (1 of 2)
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
CL
t
CK2
t
CH
t
Begin Auto Precharge
Bank A
Begin Auto Precharge
Bank B
CMS
t
t
CKS
CKH
t
CMH
CS
RAS
CAS
WE
*BS0
A10
t
AH
t
AS
ADD
DQM
DQ
t
RCD
t
t
t
DAL
DS
RRD
t
t
t
RC
DPL
t
RP
DH
QAa0
QAa1
QBa1
QAb0 QAb1 QAb2
QBa2 QBa3 QAb3
QAa2 QAa3 QBa0
Activate
Command
Bank A
Write without
Activate
Command
Bank A
Activate
Command
Bank B
Write with Activate
Auto Precharge Command
Command Bank A
Bank B
Write with
Auto Precharge
Command
Precharge
Command
Bank A
Activate
Command
Bank B
Auto Precharge
Command
Bank A
Bank A
* BS1=”L”, Bank C,D = Idle
Document :1G5-0183
Rev.1
Page29
VML [ VANGUARD INTERNATIONAL SEMICONDUCTOR ]
