參數(shù)資料
型號(hào): HM5425801B
廠商: Elpida Memory, Inc.
英文描述: 256M SSTL_2 interface DDR SDRAM 143 MHz/133 MHz/125 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank/ 16-Mword 】 4-bit 】 4-bank
中文描述: 256M SSTL_2 DDR SDRAM的接口143 MHz/133 MHz/125 MHz/100 MHz的4 Mword】16位】4-bank/8-Mword】8位】4銀行/ 16 Mword】4位】4 -銀行
文件頁(yè)數(shù): 18/65頁(yè)
文件大?。?/td> 489K
代理商: HM5425801B
HM5425161B, HM5425801B, HM5425401B Series
Data Sheet E0086H20
18
Function Truth Table (4)
Current state
Write with auto-
pre-charge*
11
CS
RAS CAS WE
Address
Command
Operation
Next state
H
×
×
×
×
DESL
NOP
Precharging
L
H
H
H
×
×
NOP
NOP
Precharging
L
H
H
L
BST
ILLEGAL
L
H
L
H
BA, CA, A10
READ/READA
ILLEGAL*
15
L
H
L
L
BA, CA, A10
WRIT/WRIT A
ILLEGAL*
15
L
L
H
H
BA, RA
ACTV
ILLEGAL*
12, 15
L
L
H
L
BA, A10
PRE, PALL
ILLEGAL*
12, 15
L
L
L
×
×
ILLEGAL
Notes: 1. H: V
IH
. L: V
IL
.
×
: V
IH
or V
IL
.
2. The DDR SDRAM is in "Precharging" state for t
RP
after precharge command is issued.
3. The DDR SDRAM reachs "IDLE" state t
RP
after precharge command is issued.
4. The DDR SDRAM is in "Refresh" state for t
RC
after auto-refresh command is issued.
5. The DDR SDRAM is in "Activating" state for t
RCD
after ACTV command is issued.
6. The DDR SDRAM is in "Active" state after "Activating" is completed.
7. The DDR SDRAM is in "READ" state until burst data have been output and DQ output circuits are
turned off.
8. The DDR SDRAM is in "READ with auto-precharge" from READA command until burst data has
been output and DQ output circuits are turned off.
9. The DDR SDRAM is in "WRITE" state from WRIT command to the last burst data are input.
10.The DDR SDRAM is in "Write recovering" for t
WR
after the last data are input.
11.The DDR SDRAM is in "Write with auto-precharge" until t
WR
after the last data has been input.
12.This command may be issued for other banks, depending on the state of the banks.
13.All banks must be in "IDLE".
14.Before executing a write command to stop the preceding burst read operation, BST command must
be issued.
15.See
Read with Auto-Precharge Enabled, Write with Auto-Precharge Enable
section.
相關(guān)PDF資料
PDF描述
HM5425161BTT-75A 256M SSTL_2 interface DDR SDRAM 143 MHz/133 MHz/125 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank/ 16-Mword 】 4-bit 】 4-bank
HM5425801BTT-75A 256M SSTL_2 interface DDR SDRAM 143 MHz/133 MHz/125 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank/ 16-Mword 】 4-bit 】 4-bank
HM5425401BTT-75A 256M SSTL_2 interface DDR SDRAM 143 MHz/133 MHz/125 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank/ 16-Mword 】 4-bit 】 4-bank
HM5425161BTT-75B 256M SSTL_2 interface DDR SDRAM 143 MHz/133 MHz/125 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank/ 16-Mword 】 4-bit 】 4-bank
HM5425801BTT-75B 256M SSTL_2 interface DDR SDRAM 143 MHz/133 MHz/125 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank/ 16-Mword 】 4-bit 】 4-bank
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