EtronTech
EM636165-XXI
1M x 16 SDRAM
Figure 17.2. Auto Precharge after Write Burst
(Burst Length=4, CAS# Latency=2)
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
tCK2
High
CKE
CS#
RAS#
CAS#
WE#
A11
RAx
RBy
RBy
RBx
RBx
RAz
RAz
A10
A0~A9
DQM
CAy
CBx
CAz
CAx
CBy
RAx
Hi-Z
DAx0
Write
DBy1
DAz2 DAz3
DBy2 DBy3
Activate
DQ
DAx1 DAx2 DAx3 DBx0 DBx1 DBx2 DBx3 DAy0 DAy1DAy2 DAy3
DBy0
DAz0 DAz1
Activate
Command Command
Bank A Bank A
Activate
Write with
Write with
Auto Precharge
Command
Activate
Write with
Write with
Command Auto Precharge
Command Auto Precharge Command Auto Precharge
Bank B
Command
Bank B
Bank B
Command
Bank B
Bank A
Command
Bank A
Bank A
Preliminary
58
Rev. 1.1 Apr. 2005
ETRON [ ETRON TECHNOLOGY, INC. ]
