MK31VT464-10YE (98.07.24)
FUNCTION TRUTH TABLE (CKE) (Table2)
Current State(n) CKEn-1 CKEn
/CS
X
H
L
/RAS /CAS
/WE
X
X
H
L
ADDR
X
Action
INVALID
Exit Self Refresh ABI
Exit Self Refresh ABI
ILLEGAL
Self Refresh
H
L
L
L
L
L
L
H
L
L
L
L
L
L
H
H
H
H
H
H
H
H
L
X
H
H
H
H
H
L
X
H
H
H
H
H
L
H
L
L
L
L
L
L
L
L
X
X
H
H
H
L
X
X
X
H
H
H
X
X
X
X
H
H
H
L
X
X
H
H
L
X
X
X
X
H
H
L
X
X
X
X
H
H
L
H
L
L
X
X
X
X
X
X
X
X
L
L
L
X
X
H
L
L
L
X
X
X
X
X
H
L
X
X
X
X
X
X
X
ILLEGAL
ILLEGAL
NOP (Maintain Self Refresh)
INVALID
Exit Power Down ABI
Exit Power Down ABI
ILLEGAL
Power Down
X
X
X
X
X
H
L
X
X
X
X
X
X
X
ILLEGAL
L
ILLEGAL 6
X
X
H
L
L
L
L
L
L
X
X
X
X
X
NOP (Continue power down mode)
Refer to Table 1
Enter Power Down
Enter Power Down
ILLEGAL
ILLEGAL
ILLEGAL
Enter Self Refresh
ILLEGAL
NOP
All Banks idle 6
(ABI)
X
L
X
X
L
L
H
L
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Any State
Other than
Listed Above
H
H
L
H
L
H
L
Refer to Operations in Table 1
Begin Clock Suspend Next Cycle
Enable Clock of Next Cycle
Continue Clock Suspension
L
X
Notes:
6. Power-down and self refresh can be entered only when all the banks are in an idle state.
Page 11/11
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