參數資料
型號: HY5DU561622ELFP-L
廠商: Hynix Semiconductor Inc.
英文描述: 256Mb DDR SDRAM
中文描述: 256Mb的DDR SDRAM內存
文件頁數: 8/29頁
文件大小: 260K
代理商: HY5DU561622ELFP-L
Rev. 1.1 / J une 2006
8
1
HY5DU56822E(L)FP
HY5DU561622E(L)FP
SIMPLIFIED COMMAND TRUTH TABLE
Command
CKEn-1
CKEn
/ CS
/ RAS
/ CAS
/ WE
ADDR
A10/ AP
BA
Extended Mode Register Set
1,2
H
X
L
L
L
L
OP code
Mode Register Set
1,2
H
X
L
L
L
L
OP code
Device Deselect
1
H
X
H
X
X
X
X
No Operation
1
L
H
H
H
Bank Active
1
H
X
L
L
H
H
RA
V
Read
1
H
X
L
H
L
H
CA
L
V
Read with Autoprecharge
1,3
H
Write
1
H
X
L
H
L
L
CA
L
V
Write with Autoprecharge
1,4
H
Precharge All Banks
1,5
H
X
L
L
H
L
X
H
X
Precharge selected Bank
1
L
V
Read Burst Stop
1
H
X
L
H
H
L
X
Auto Refresh
1
H
H
L
L
L
H
X
Self Refresh
1
Entry
H
L
L
L
L
H
X
Exit
L
H
H
X
X
X
L
H
H
H
Precharge Power
Down Mode
1
Entry
H
L
H
X
X
X
X
L
H
H
H
Exit
L
H
H
X
X
X
L
H
H
H
Active Power
Down Mode
1
Entry
H
L
H
X
X
X
X
L
V
V
V
Exit
L
H
X
Note:
1. LDM/UDM states are Don’t Care. Refer to below Write Mask Truth Table.
2. OP Code(Operand Code) consists of A0~A12 and BA0~BA1 used for Mode Register setting
during
Extended MRS or MRS.
Before entering Mode Register Set mode, all banks must be in a precharge state and MRS command can be issued after tRP
period from Precharge command.
3. If a Read with Autoprecharge command is detected by memory component in CK(n), then there will be no command presented
to activated bank until CK(n+BL/2+tRP).
4. If a Write with Autoprecharge command is detected by memory component in CK(n), then there will be no command presented
to activated bank until CK(n+BL/2+1+tWR+tRP). Write Recovery Time (tWR) is needed to guarantee that the last data has been
completely written.
5. If A10/AP is High when Precharge command being issued, BA0/BA1 are ignored and all banks are selected to be
precharged.
*For more information about Truth Table, refer to “Device Operation” section in hynix website.
( H=Logic High Level, L=Logic Low Level, X=Don’t Care, V=Valid Data Input, OP Code=Operand Code, NOP=No Operation )
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