參數(shù)資料
型號(hào)： HB52RD168DB
廠商： Hitachi,Ltd.
英文描述： 128 MB Unbuffered SDRAM S.O.DIMM(128MB 未緩沖同步DRAM DIMM)
中文描述： 128 MB的無(wú)緩沖內(nèi)存的SODIMM（128MB的未緩沖同步的DRAM內(nèi)存）
文件頁(yè)數(shù)： 22/67頁(yè)
文件大?。?/td> 623K
代理商： HB52RD168DB
HB52RD168DB-D
22
Command Operation
Command Truth Table
The SDRAM module recognizes the following commands specified by the
S
,
RE
,
CE
,
W
and address pins.
CKE
Command
Symbol
n - 1 n
S
RE
CE
W
A12/A13 A10
A0
to A11
Ignore command
DESL
H
×
×
×
×
×
×
×
×
×
×
H
×
×
×
×
×
×
×
×
×
×
×
×
No operation
NOP
H
L
H
H
H
Burst stop in full page
BST
H
L
H
H
L
Column address and read command READ
H
L
H
L
H
V
L
V
Read with auto-precharge
READ A
H
L
H
L
H
V
H
V
Column address and write command WRIT
H
L
H
L
L
V
L
V
Write with auto-precharge
WRIT A
H
L
H
L
L
V
H
V
Row address strobe and bank active ACTV
H
L
L
H
H
V
V
V
Precharge select bank
PRE
H
L
L
H
L
V
L
×
×
×
Precharge all bank
PALL
H
L
L
H
L
×
×
H
Refresh
REF/SELF H
V
L
L
L
H
×
Mode register set
Note:
H: V
IH
. L: V
IL
.
×
: V
IH
or V
IL
. V: Valid address input
MRS
H
×
L
L
L
L
V
V
V
Ignore command [DESL]:
When this command is set (
S
is High), the SDRAM module ignore 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.
Burst stop in full-page [BST]:
This command stops a full-page burst operation (burst length = full-page)
and is illegal otherwise. When data input/output is completed for a full page of data, it automatically
returns to the start address, and input/output is performed repeatedly.
Column address strobe and read command [READ]:
This command starts a read operation. In
addition, the start address of burst read is determined by the column address and the bank select address
(BA). After the read operation, the output buffer becomes High-Z.
Read with auto-precharge [READ A]:
This command automatically performs a precharge operation
after a burst read with a burst length of 1, 2, 4 or 8. When the burst length is full-page, this command is
illegal.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HB52RD168DB-A6F 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:x64 SDRAM Module
HB52RD168DB-A6FL 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:x64 SDRAM Module
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HB52RD168DB-B6FL 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:x64 SDRAM Module
HB52RD168GB-A6F 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:x64 SDRAM Module
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