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參數(shù)資料
| 型號： | AD484M1644VTA-8LI |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Ascend Semiconductor Corporation(64Mb SDRAM) |
| 中文描述： | 登半導(dǎo)體公司（64MB內(nèi)存） |
| 文件頁數(shù)： | 10/20頁 |
| 文件大小： | 85K |
| 代理商： | AD484M1644VTA-8LI |
Preliminary
10
64Mb SDRAM
Ascend Semiconductor Corporation
Command
Symbol
CKE
Ignore Command
No operation
Burst stop
Read
Read with auto pre-charge
Write
Write with auto pre-charge
Bank activate
Pre-charge select bank
Pre-charge all banks
Mode register set
DESL
NOP
BSTH
READ
READA
WRIT
WRITA
ACT
PRE
PALL
MRS
Truth Table
1. Command Truth Table ( AD484M1644VTA )
H
H
H
H
H
H
H
H
H
H
H
X
X
X
X
X
X
X
X
X
X
X
n-1
n
/CS
H
L
L
L
L
L
L
L
L
L
L
/RAS
X
H
H
H
H
H
L
L
L
L
L
/CAS
X
H
H
L
L
L
H
H
H
H
L
/WE
X
H
L
H
H
L
H
H
L
L
L
BA0,
BA1
X
X
X
V
V
V
V
V
V
X
L
A10
X
X
X
L
H
L
H
V
L
H
L
A11,
A9~A0
X
X
X
V
V
V
V
V
X
X
V
Note :
H = High level, L = Low level, X = High or Low level (Don't care), V = Valid data input
Command
Symbol
CKE
Data write / output enable
Data mask / output disable
Upper byte write enable / output enable
Read
Read with auto pre-charge
Write
Write with auto pre-charge
Bank activate
Pre-charge select bank
Pre-charge all banks
Mode register set
ENB
MASK
BSTH
READ
READA
WRIT
WRITA
ACT
PRE
PALL
MRS
2. DQM Truth Table
H
H
H
H
H
H
H
H
H
H
H
X
X
X
X
X
X
X
X
X
X
X
n-1
n
/CS
H
L
L
L
L
L
L
L
L
L
L
Note :
H = High level, L = Low level, X = High or Low level (Don't care), V = Valid data input
Command
Symbol
CKE
Activating
Any
Clock suspend
Idle
Idle
3. CKE Truth Table
H
L
L
H
H
L
L
L
L
H
H
L
H
H
n-1
n
/CS
X
X
X
L
L
L
H
/RAS
X
X
X
L
L
H
X
/CAS
X
X
X
L
L
H
X
/WE
X
X
X
H
H
H
X
Addr.
X
X
X
X
X
X
X
REF
SELF
Self refresh
Idle
Power down
H
L
L
H
X
X
X
X
X
X
X
X
X
X
Remark
H = High level, L = Low level, X = High or Low level (Don't care)
Command
Clock suspend mode entry
Clock suspend mode
Clock suspend mode exit
CBR refresh command
Self refresh entry
Self refresh exit
Power down entry
Power down exit
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| AD484M1644VTA-10LI | Ascend Semiconductor Corporation(64Mb SDRAM) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD48500A | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AD48-6 | 制造商:SMC Corporation of America 功能描述:Auto Drain, float type, N.O., for AF series, airline |
| AD48ABS | 制造商:POP 功能描述: |
| AD48BS | 制造商:POP 功能描述: |
| AD48H | 制造商:POP 功能描述: |
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