is42g32256 ETC-unknow, is42g32256 Datasheet - Page 28

• Manufacturer Part Number: is42g32256
• Description: 256k 16-mbit Synchronous Graphics
• Manufacturer: ETC-unknow

IS42G32256
Table 15. Function Truth Table for CKE
Self Refresh
Both Bank Precharge Power Down
All Banks Idle
Any State Other Than Listed Above
Abbreviations:
ABI = All Banks Idle
28
Current
State
Notes:
1. After CKEs low-to-high transition to exit self refresh mode. And a time of t
2. CKE low to high transition is asynchronous as if restart internal clock.
3. Power down and self refresh can be entered only from the all banks idle state.
4. Must be a legal command.
A minimum setup time “t
transition to issue a new command.
CKE CKE
(n-1)
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
X
H
H
H
H
H
X
H
H
H
H
H
H
H
H
n
L
L
L
L
L
L
L
L
L
L
L
L
SS
CS CS CS CS CS RAS
H
H
H
X
X
X
X
X
X
X
X
X
X
L
L
L
L
L
L
L
L
L
L
L
L
L
L
+ one clock” must be satisfy before any command other than exit.
RAS
RAS
RAS
RAS CAS
X
X
H
H
H
X
X
X
H
H
H
X
X
X
H
H
H
X
X
X
X
X
L
L
L
L
L
CAS
CAS
CAS
CAS WE
H
H
H
H
H
H
H
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
L
L
L
L
L
WE
WE
WE
WE
X
X
H
X
X
X
X
X
H
X
X
X
X
X
H
X
X
H
X
X
X
X
X
L
L
L
L
DSF
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
ADDR
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
RC
Action
INVALID
Exit Self Refresh
Exit Self Refresh
ILLEGAL
ILLEGAL
ILLEGAL
NOP (Maintain Self Refresh)
INVALID
Exit Power Down
Exit Power Down
ILLEGAL
ILLEGAL
ILLEGAL
NOP (Maintain Low Power Mode)
Refer to Table 14
Enter Power Down
Enter Power Down
ILLEGAL
ILLEGAL
ILLEGAL
Enter Self Refresh
ILLEGAL
NOP
Refer to Operations in Table 14
Begin Clock Suspend next cycle
Exit Clock Suspend next cycle
Maintain Clock Suspend
(min) has to be elapse after CKEs low-to-high
Integrated Silicon Solution, Inc.
(3)
(3)
ADVANCE INFORMATION SR037-0C
• • • after t
• • • after t
ABI
ABI
(2)
(2)
(4)
RC (1)
RC (1)
(4)
ISSI
09/10/98
®