
LG Semicon
GM72V66841CT/CLT
64M SDRAM Function State Diagram
Automatic Transition after completion of command.
Transition resulting from command input.
Power
ON
PRE-
CHARGE
Precharge
IDLE
SR ENTRY
SR EXIT
SELF-
REFRESH
MODE
REGISTER
SET
MRS
REFRESH
AUTO-
REFRESH
IDLE
Power
DOWN
ROW
ACTIVE
A
CKE=L
CKE=H
CKE=H
CKE=L
READ
READ
SUSPEND
WRITE
SUSPEND
READA
WRITEA
READA
SUSPEND
WRITEA
SUSPEND
CKE=L
CKE=H
CKE=L
CKE=H
WRTE
READ
WIEWT P
P
RA WT P
WRITE
PEHRE
PEHRE
Read
Write
CKE=L
CKE=H
CKE=L
CKE=H
WRITE
READ
WITH AP
READ
WITH AP
WRITE
WITH AP
WITH AP
ACTIVE
Clock
SUSPEND
Power
APPLIED
BST
(on full page)
BST
(on full page)
14
Note: 1. After the auto-refresh operation, Precharge is performed automatically and enter the IDLE state.
*1