VG36128401A
VG36128801A
Preliminary
VG36128161A
CMOS Synchronous Dynamic RAM
VIS
Basic Features and Function Description
1.Simplified State Diagram
Self
Refresh
Mode
Register
Set
MRS
AUTO
REF
Refresh
IDLE
Power
Down
Active
Power
Down
CKE
ROW
ACTIVE
CKE
Read
Write (Write recovery)
READ
SUSPEND
Read (write recovery)
Write
CKE
CKE
CKE
CKE
WRITE
SUSPEND
READ
WRITE
Write with
Auto Precharge
Read with
Auto Precharge
CKE
READA
WRITEA
SUSPEND
CKE
WRITEA
READA
SUSPEND
CKE
CKE
Precharge
POWER
ON
Precharge
Automatic sequence
Manual input
Note: After the AUTO refresh operation, precharge operation is
performed automatically and enter the IDLE state.
Document : 1G5-0154
Rev.1
Page 8
VML [ VANGUARD INTERNATIONAL SEMICONDUCTOR ]
