EtronTech
EM638325
2Mega x 32 SDRAM
Figure 17.3. Auto Precharge after Write Burst (Burst Length=4, CAS# Latency=3)
T0 T 1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T 11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
tCK3
High
CKE
CS#
RAS#
CAS#
WE#
`
BS0,1
A9
RBx
RBx
RAx
RBy
RBy
RAx
CBx
CAx
CAy
CBy
A0~A9
DQM
DQ
Hi-Z
DAx0
DBy1 DBy2DBy3
DAx1 DAx2 DAx3DBx0 DBx1 DBx2 DBx3 DAy0 DAy1 DAy2 DAy3
DBy0
Activate
Command
Bank A
Activate
Write with
Auto Precharge
Command
Write with
Auto Precharge
Command
Activate
Command
Bank B
Write with
Command
Bank B
Auto Precharge
Command
Bank B
Write
Command
Bank A
Bank B
Bank A
Preliminary
58
Rev 1.4
Oct. 2005
ETRON [ ETRON TECHNOLOGY, INC. ]
