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参数资料
| 型号： | 48SD1616 |
| 厂商： | Maxwell Technologies, Inc |
| 英文描述： | 256 Mb SDRAM 4-Meg X 16-Bit X 4-Banks |
| 中文描述： | 256 MB的SDRAM的4梅格x 16位× 4，银行 |
| 文件页数： | 41/42页 |
| 文件大小： | 596K |
| 代理商： | 48SD1616 |
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48SD1616
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All data sheets are subject to change without notice
2005 Maxwell Technologies
All rights reserved.
256Mb (4-Meg X 16-Bit X 4-Banks) SDRAM
01.07.05 REV 4
Command Operation
Command Truth Table
The SDRAM recognizes the following commands specified by the CS, RAS, CAS, WE and address pins:
Note: H: V
IH L: VIL x VIH or VIL V: Valid address input
Ignore command (DESL): When this command is set (CS = High), the SDRAM ignores command input at
the clock. However, the internal status is held.
No Operation (NOP): This command is not an execution command. However, the internal operations
continue.
Column address strobe and read command (READ): This command starts a read operation. In addition,
the start address of a burst read is determined by the column address (AY0 to AY8) and the bank select
address (BS). After the read operation, the output buffer becomes High-Z.
COMMAND
SYMBOL
N
-1
N
CS
RAS
CAS
WE
BA0/
BA1
A10
A0 TO
A12
Ignore command
DESL
H
x
H
x
No Operation
NOP
H
x
L
H
x
Column Address and
Read command
READ
H
x
LH
V
L
V
Read with auto-pre-
charge
READ A
H
x
L
H
L
H
V
H
V
Column Address and
write command
WRIT
H
x
L
H
L
V
L
V
Write with auto-pre-
charge
WRIT A
H
x
L
H
L
V
H
V
Row address strobe
and bank active
ACTV
H
x
L
H
V
Precharge select
bank
PRE
H
x
L
H
L
V
L
x
Precharge all banks
PALL
H
x
L
H
L
x
H
x
Refresh
REF/SELF
H
LLLL
H
x
Mode register set
MRS
H
x
LLLL
V
相关PDF资料 |
PDF描述 |
|---|---|
| 48SD3208RPFK | CAP 1.5UF 50V CERAMIC MONO 20% |
| 48SD3208RPFE | 256 Mb SDRAM 8-Meg X 8-Bit X 4-Banks |
| 48SD3208RPFH | 256 Mb SDRAM 8-Meg X 8-Bit X 4-Banks |
| 48SD3208RPFI | CAP 1.5UF 50V CERAMIC MONO 20% |
| 48SD3208 | 256 Mb SDRAM 8-Meg X 8-Bit X 4-Banks |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 48SD1616RPFE | 制造商:MAXWELL 制造商全称:Maxwell Technologies 功能描述:256 Mb SDRAM 4-Meg X 16-Bit X 4-Banks |
| 48SD1616RPFH | 制造商:MAXWELL 制造商全称:Maxwell Technologies 功能描述:256 Mb SDRAM 4-Meg X 16-Bit X 4-Banks |
| 48SD1616RPFI | 制造商:MAXWELL 制造商全称:Maxwell Technologies 功能描述:256 Mb SDRAM 4-Meg X 16-Bit X 4-Banks |
| 48SD1616RPFK | 制造商:MAXWELL 制造商全称:Maxwell Technologies 功能描述:256 Mb SDRAM 4-Meg X 16-Bit X 4-Banks |
| 48SD3208 | 制造商:MAXWELL 制造商全称:Maxwell Technologies 功能描述:256 Mb SDRAM 8-Meg X 8-Bit X 4-Banks |
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