W9425G6KH-5-TR Datasheet, PDF (21/52 Pages) Winbond – 4 M 4 BANKS 16 BITS DDR SDRAM

W9425G6KH
9.3 Function Truth Table for CKE
CURRENT
STATE
Self Refresh
Power Down
All banks Idle
Row Active
Any State
Other Than
Listed Above
CKE
n-1 n
HX
LH
LH
LH
LH
LL
HX
LH
LL
HH
HL
HL
HL
HL
HL
LX
HH
HL
HL
HL
HL
HL
LX
HH
CS RAS CAS
XX X
HX X
LH H
LH L
LL X
XX X
XX X
XX X
XX X
XX X
HX X
LH H
LL L
LH L
LL X
XX X
XX X
HX X
LH H
LL L
LH L
LL X
XX X
XX X
W E ^ADDRESS
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
H
X
X
X
X
X
X
X
X
X
X
X
X
X
H
X
X
X
X
X
X
X
X
X
ACTION
INVALID
Exit Self Refresh->Idle after tXSNR
Exit Self Refresh->Idle after tXSNR
ILLEGAL
ILLEGAL
Maintain Self Refresh
INVALID
Exit Power down->Idle after tIS
Maintain power down mode
Refer to Function Truth Table
Enter Power down
Enter Power down
Self Refresh
ILLEGAL
ILLEGAL
Power down
Refer to Function Truth Table
Enter Power down
Enter Power down
ILLEGAL
ILLEGAL
ILLEGAL
Power down
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: Nov. 17, 2014
Revision: A02