M32L1632512A
FUNCTION TRUTH TABLE (TABLE 1, Continued)
*Note : 1. All entries assume the CKE was active (High) during the preceding clock cycle and the current clock cycle.
2. Illegal to bank in specified state ; Function may be legal in the bank indicated by BA, depending on the state of that
bank.
3. Must satisfy bus contention, bus turn around, and/or write recovery requirements.
4. NOP to bank precharging or in idle state. May precharge bank indicated by BA (and PA).
5. Illegal if any bank is not idle.
6. Legal only if all banks are in idle or row active state.
FUNCTION TRUTH TABLE for CKE (TABLE2)
Current
State
CKE CKE
DSF ADDR
ACTION
Note
CS RAS CAS WE
( n-1 )
n
H
L
X
H
X
H
X
X
X
X
X
X
X
X
X
X
INVALID
7
7
Exit Self Refresh
after tRC
after tRC
Self
L
H
L
H
H
H
X
X
Exit Self Refresh
ILLEGAL
ILLEGAL
ILLEGAL
NOP (Maintain Self Refresh)
INVALID
Exit Power Down ABI
Exit Power Down ABI
ILLEGAL
ILLEGAL
ILLEGAL
NOP (Maintain Low Power Mode)
Refer to Table 1
Enter Power Down
Enter Power Down
ILLEGAL
ILLEGAL
ILLEGAL
Enter Self Refresh
ILLEGAL
NOP
Refresh
L
L
L
L
H
L
L
L
L
L
L
H
H
H
H
H
H
H
H
L
H
H
L
L
H
H
H
L
X
H
H
H
H
H
L
H
L
L
L
L
L
L
L
L
H
L
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
H
H
L
X
X
X
H
H
H
L
X
X
X
H
H
H
L
H
L
L
X
X
X
X
X
H
L
X
X
X
X
X
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
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
X
X
X
H
H
L
X
X
X
X
H
H
L
H
L
L
X
X
X
X
X
Both
Bank
Precharge
Power
8
8
Down
9
9
All
Banks
Idle
L
L
9
X
X
X
X
X
Any State
other than
Listed
Refer to Operations in Table 1
Begin Clock Suspend next cycle
Exit Clock Suspend next cycle
Maintain Clock Suspend
10
10
Above
ABBREVIATIONS : ABI = All Banks Idle
*Note : 7.After CKE’s low to high transition to exit self refresh mode. And a time of tRC(min) has to be elapse after CKE’s low to
high transition to issue a new command.
8.CKE low to high transition is asynchronous as if restart internal clock.
A minimum setup time “ tSS + one clock “ must be satisfy before any command other than exit.
9.Power down and self refresh can be entered only from the all banks idle state.
10.Must be a legal command.
Elite Semiconductor Memory Technology Inc.
Publication Date : Jun. 2001
Revision : 1.6 32/54
ESMT [ ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC. ]
