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H5DU2562GTR Datasheet(PDF) 8 Page - Hynix Semiconductor

Part No. H5DU2562GTR
Description  256Mb DDR SDRAM
Download  28 Pages
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Maker  HYNIX [Hynix Semiconductor]
Homepage  http://www.skhynix.com/kor/main.do
Logo HYNIX - Hynix Semiconductor

H5DU2562GTR Datasheet(HTML) 8 Page - Hynix Semiconductor

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Rev. 1.1 / Sep. 2009
8
H5DU2562GTR
H5DU2582GTR
SIMPLIFIED COMMAND TRUTH TABLE
Command
CKEn-1
CKEn
/CS
/RAS
/CAS
/WE
ADDR
A10/AP
BA
Extended Mode Register Set1,2
H
X
LLL
L
OP code
Mode Register Set1,2
H
X
LLL
L
OP code
Device Deselect1
HX
H
XXX
X
No Operation1
LH
H
H
Bank Active1
HXL
L
H
H
RA
V
Read1
HXL
H
L
H
CA
L
V
Read with Autoprecharge1,3
H
Write1
HXL
H
L
L
CA
L
V
Write with Autoprecharge1,4
H
Precharge All Banks1,5
HXL
L
H
L
X
HX
Precharge selected Bank1
LV
Read Burst Stop1
HXL
H
H
L
X
Auto Refresh1
HHLLL
H
X
Self Refresh1
Entry
H
L
LLL
H
X
Exit
LH
H
XXX
LH
H
H
Precharge Power
Down Mode1
Entry
HL
H
XXX
X
LH
H
H
Exit
LH
H
XXX
LH
H
H
Active Power
Down Mode1
Entry
HL
H
XXX
X
L
VVV
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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