ESMT
M13S64164A
Operation Temperature Condition -40°C~85°C
Read With Auto Precharge
If a read with auto-precharge command is initiated, the DDR SDRAM automatically enters the precharge operation BL/2 clock
later from a read with auto-precharge command when tRAS(min) is satisfied. If not, the start point of precharge operation will be
delayed until tRAS(min) is satisfied. Once the precharge operation has started the bank cannot be reactivated and the new
command can not be asserted until the precharge time (tRP) has been satisfied
<Burst Length = 4, CAS Latency = 3>
0
1
2
3
4
5
6
7
8
C L K
C L K
C OMMAND
R
ea d
A
B a n k
A
N OP
N OP
N OP
N OP
N OP
N OP
N OP
Auto Pre cha rg e
A CT I V E
t R A P
D QS
C A S L a t e n cy = 3
Dout
0
Dout 2 Dout 3
1
D Q' s
Dout
At burst read / write with auto precharge, CAS interrupt of the same bank is illegal.
Elite Semiconductor Memory Technology Inc.
Publication Date : Mar. 2009
Revision : 1.0 24/49
ESMT [ ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC. ]
