參數(shù)資料
型號： HB52E169E12
廠商： Hitachi,Ltd.
英文描述： 128 MB Registered SDRAM DIMM(128 MB 寄存同步DRAM DIMM)
中文描述： 128 MB的注冊SDRAM的內(nèi)存（128 MB的寄存同步的DRAM內(nèi)存）
文件頁數(shù)： 16/53頁
文件大?。?/td> 1737K
代理商： HB52E169E12
HB52E169E12-F
16
V
CC
(power supply pins):
3.3 V is applied.
V
SS
(power supply pins):
Ground is connected.
Command Operation
Command Truth Table
The SDRAM module recognizes the following commands specified by the S, RE, CE, W and address pins.
Note: H: V
IH
. L: V
IL
.
×
: V
IH
or V
IL
. V: Valid address input
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 con-
tinue.
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.
Column address strobe and write command [WRIT]:
This command starts a write operation. When the
burst write mode is selected, the column address and the bank select address (BA) become the burst write start
address. When the single write mode is selected, data is only written to the location specified by the column
address and the bank select address (BA).
Write with auto-precharge [WRIT A]:
This command automatically performs a precharge operation after
a burst write with a length of 1, 2, 4 or 8, or after a single write operation. When the burst length is full-page,
this command is illegal.
Command
Ignore command
No operation
Burst stop in full page
Column address and read command
Read with auto-precharge
Column address and write command
Write with auto-precharge
Row address strobe and bank active
Precharge select bank
Precharge all bank
Refresh
Mode register set
Symbol
DESL
NOP
BST
READ
READ A
WRIT
WRIT A
ACTV
PRE
PALL
REF/SELF H
MRS
CKE
n - 1 n
H
H
H
H
H
H
H
H
H
H
S
H
L
L
L
L
L
L
L
L
L
L
L
RE
×
H
H
H
H
H
H
L
L
L
L
L
CE
×
H
H
L
L
L
L
H
H
H
L
L
W
×
H
L
H
H
L
L
H
L
L
H
L
A12/
A13
×
×
×
V
V
V
V
V
V
×
×
V
A10
×
×
×
L
H
L
H
V
L
H
×
V
A0
to A11
×
×
×
V
V
V
V
V
×
×
×
V
×
×
×
×
×
×
×
×
×
×
V
×
H
相關(guān)PDF資料
PDF描述
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