参数资料
型号: W9425G6EH-5
厂商: Winbond Electronics
文件页数: 43/54页
文件大小: 0K
描述: IC DDR-400 SDRAM 256MB 66TSSOPII
标准包装: 108
格式 - 存储器: RAM
存储器类型: DDR SDRAM
存储容量: 256M(16Mx16)
速度: 250MHz
接口: 并联
电源电压: 2.3 V ~ 2.7 V
工作温度: 0°C ~ 70°C
封装/外壳: 66-TSSOP(0.400",10.16mm 宽)
供应商设备封装: 66-TSOP II
包装: 托盘
W9425G6EH
11.9 Auto-precharge Timing (Read cycle, CL = 2), continued
2) t RCD/RAP(min) ≤ t RCD (READA) < t RAS (min) – (BL/2) × t CK
BL=2
CLK
CLK
t RAS
t RP
CMD
ACT
READA
AP
ACT
t RAP
t RCD
DQS
BL=4
DQ
Q0
Q1
CMD
ACT
READA
AP
ACT
t RAP
t RCD
DQS
DQ
Q0
Q1
Q2
Q3
BL=8
CMD
ACT
READA
AP
ACT
t RAP
t RCD
DQS
DQ
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Notes: CL2 shown; same command operation timing with CL = 2.5, CL=3.
In this case, the internal precharge operation does not begin until after t RAS (min) has command.
AP
Represents the start of internal precharging.
The Read with Auto-precharge command cannot be interrupted by any other command.
Publication Release Date:Dec. 03, 2008
- 43 -
Revision A08
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