参数资料
型号: MT46V4M32LG
厂商: Micron Technology, Inc.
英文描述: I.MX31 LITE KIT
中文描述: 双倍数据速率的DDR SDRAM内存
文件页数: 29/66页
文件大小: 1921K
代理商: MT46V4M32LG
29
128Mb: x32 DDR SDRAM
4M32DDR_B.p65 – Rev. B, Pub. 7/02
Micron Technology, Inc., reserves the right to change products or specifications without notice.
2002, Micron Technology, Inc.
128Mb: x32
DDR SDRAM
ADVANCE
Figure 19
WRITE to READ – Uninterrupting
t
DQSS (NOM)
CK
CK#
COMMAND
WRITE
NOP
NOP
READ
NOP
NOP
ADDRESS
Bank
a
,
Col
b
Bank
a
,
Col
n
NOP
T0
T1
T2
T3
T2n
T4
T5
NOTE
: 1. DI
b
= data-in for column
b
.
2. Three subsequent elements of data-in are applied in the programmed order following DI
b
.
3. An uninterrupted burst of 4 is shown.
4.tWTR is referenced from the first positive CK edge after the last data-in pair.
5. The READ and WRITE commands are to the same bank. However, the READ and WRITE commands may be
to different devices, in which case tWTR is not required and the READ command could be applied earlier.
6. A8 is LOW with the WRITE command (auto precharge is disabled).
T1n
T6
T6n
t
WTR
CL = 2
DQ
DQS
DM
DI
b
DI
n
t
DQSS
t
DQSS (MIN)
CL = 2
DQ
DQS
DM
DI
b
DI
n
t
DQSS
t
DQSS (MAX)
CL = 2
DQ
DQS
DM
DI
b
DI
n
t
DQSS
DON T CARE
TRANSITIONING DATA
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