W9425G6JH_13 Datasheet, PDF (21/52 Pages) Winbond – 4 M x 4 BANKS x 16 BITS DDR SDRAM

W9425G6JH
9.3 Function Truth Table for CKE
CURRENT
STATE
CKE
CS RAS CAS W E ADDRESS
n-1 n
ACTION
HXX X X X
X
INVALID
LHH X X X
X
Exit Self Refresh->Idle after tXSNR
LHL H H X
Self Refresh
LHL H L X
X
Exit Self Refresh->Idle after tXSNR
X
ILLEGAL
LHL L X X
X
ILLEGAL
LLX X X X
X
Maintain Self Refresh
HXX X X X
X
INVALID
Power Down L H X X X X
X
Exit Power down->Idle after tIS
LLX X X X
X
Maintain power down mode
HHX X X X
X
Refer to Function Truth Table
HLH X X X
X
Enter Power down
HL L H H X
X
Enter Power down
All banks Idle H L L L L H
X
Self Refresh
HL L H L X
X
ILLEGAL
HL L L X X
X
ILLEGAL
LXX X X X
X
Power down
HHX X X X
X
Refer to Function Truth Table
HLH X X X
X
Enter Power down
HL L H H X
X
Enter Power down
Row Active H L L L L H
X
ILLEGAL
HL L H L X
X
ILLEGAL
HL L L X X
X
ILLEGAL
LXX X X X
X
Power down
Any State
Other Than H H X X X X
Listed Above
X
Refer to Function Truth Table
Notes
1. Self refresh can enter only from the all banks idle state.
2. Power Down occurs when all banks are idle; this mode is referred to as precharge power down.
3. Power Down occurs when there is a row active in any bank; this mode is referred to as active power down.
Remark: H = High level, L = Low level, X = High or Low level (Don’t care), V = Valid data
NOTES
2
2
1
3
3
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Publication Release Date: Aug. 27, 2013
Revision A03