參數(shù)資料
型號(hào): V55C2128164VB
廠商: Mosel Vitelic, Corp.
英文描述: 128Mbit LOW-POWER SDRAM 2.5 VOLT, TSOP II / BGA PACKAGE 8M X 16
中文描述: 128Mbit低功率SDRAM 2.5伏,第二的TSOP / BGA封裝,8米× 16
文件頁數(shù): 42/44頁
文件大?。?/td> 591K
代理商: V55C2128164VB
42
V55C2128164V(T/B) Rev. 1.2 August 2002
MOSEL VITELIC
V55C2128164V(T/B)
20.2 Deep Power Down Exit
The deep power down mode is exited by asserting CKE high. After the exit, the following sequence is needed to
enter a new command:
1. Maintain NOP input conditions for a minimum of 200
μ
s
2. Issue precharge commands for all banks of the device
3. Issue eight or more autorefresh commands
4. Issue a mode register set command to initialize the mode register
5. Issue an extended mode register set command to initialize the extende mode register
CLK
CK E
CS
RAS
CAS
WE
tRP
All banks
precharge
200
s
Auto
refresh
Deep Power Down
exit
Auto
refresh
tRC
Mode
Register
Set
Extended
Mode
Register
Set
New
Command
Accepted
Here
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