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MD56V62160/H
FUNCTION TRUTH TABLE for CKE (Table 2)
Current State (n) CKEn-1
Self Refresh
CKEn CS RAS CAS WE ADDR
Action
H
L
L
L
L
L
L
H
L
L
L
L
L
L
H
H
H
H
H
H
H
H
L
H
H
L
L
X
H
H
H
H
H
L
X
H
L
L
L
L
X
X
H
L
L
L
L
X
X
H
L
L
L
L
L
L
X
X
X
X
X
X
X
H
H
H
L
X
X
H
H
L
X
X
H
L
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
INVALID
Exit Self Refresh --> ABI
Exit Self Refresh --> ABI
ILLEGAL
X
X
X
X
X
H
L
ILLEGAL
X
X
X
X
H
H
L
ILLEGAL
X
X
X
H
H
H
L
NOP (Maintain Self Refresh)
INVALID
Power Down
X
H
H
H
H
H
L
Exit Power Down --> ABI
Exit Power Down --> ABI
ILLEGAL
X
X
X
X
X
H
L
ILLEGAL
ILLEGAL 6
X
X
X
X
H
H
L
X
X
X
H
H
H
L
NOP (Continue power down mode)
Refer to Table 1
Enter Power Down
Enter Power Down
ILLEGAL
All Banks Idle 6
(ABI)
H
L
L
L
L
X
L
ILLEGAL
L
H
L
ILLEGAL
L
L
H
L
Enter Self Refresh
ILLEGAL
L
L
L
L
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
NOP
Any State Other
H
L
Refer to Operations in Table 1
Begin Clock Suspend Next Cycle
Enable Clock of Next Cycle
Continue Clock Suspension
than Listed Above
H
L
Note:
6. Power-down and self refresh can be entered only when all the banks are in an idle state.
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