參數(shù)資料
型號: μPD45256163
廠商: NEC Corp.
英文描述: 256M-Bit Synchronous DRAM(256M 同步 動態(tài)RAM)
中文描述: 256M位同步DRAM(256M同步動態(tài)RAM)的
文件頁數(shù): 13/84頁
文件大?。?/td> 1052K
代理商: ΜPD45256163
13
μ
PD45256441,45256841,45256163
Preliminary Data Sheet
Self refresh entry command
(/CS, /RAS, /CAS, CKE = Low, /WE = High)
After the command execution, self refresh operation continues while CKE
remains low. When CKE goes high, the
μ
PD45256xxx exits the self
refresh mode.
During self refresh mode, refresh interval and refresh operation are
performed internally, so there is no need for external control.
Before executing self refresh, both banks must be precharged.
Burst stop command
(/CS, /WE = Low, /RAS, /CAS = High)
This command can stop the current burst operation.
No operation
(/CS = Low, /RAS, /CAS, /WE = High)
This command is not a execution command. No operations begin or
terminate by this command.
Fig.7 Self refresh entry
command
/WE
/CAS
/RAS
/CS
CKE
CLK
Add
A10
(Bank select)
Fig.8 Burst stop command in
Full Page Mode
/WE
/CAS
/RAS
/CS
CKE
CLK
Add
A10
BA0, BA1
(Bank select)
H
Fig.9
No operation
/WE
/CAS
/RAS
/CS
CKE
CLK
H
Add
A10
(Bank select)
相關(guān)PDF資料
PDF描述
μPD45256441 256M-Bit Synchronous DRAM(256M 同步 動態(tài)RAM)
μPD45256841 256M-Bit Synchronous DRAM(256M 同步 動態(tài)RAM)
μPD4564163 64M-bit Synchronous DRAM(64M同步動態(tài)RAM)
μPD4564441 64M-bit Synchronous DRAM(64M同步動態(tài)RAM)
μPD4564841 64M-bit Synchronous DRAM(64M同步動態(tài)RAM)
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