1-14
IC
VGN-
S36C/S36GP/S36LP/S36SP/S36TP/S38CP/
S52B/
S62PS/S62PSY/S62S/
S350F/S350FP/
S360/S360P/
S370F
(J/AM
/AO
)
Confidential
4
Operations and Functions
4.1
Command Table
Table 9 Command Overview
Note: 1: The Power Down Mode Entry command is illegal during Burst Read or Burst Write operations.
Operation
Code
CKE
n-1
CKE
n
CS#
RAS#
CAS#
WE#
BA0
BA1
A8
A0-7
A9-11
Device Deselect
DESEL
H
X
H
X
X
X
X
X
X
X
No Operation
NOP
H
X
L
H
H
H
X
X
X
X
Mode Register Setup
MRS
H
X
L
L
L
L
0
0
OPCODE
Extended Mode Register Setup
MRS
H
X
L
L
L
L
1
0
OPCODE
Bank Activate
ACT
H
X
L
L
H
H
BA
BA
Row Address
Read
READ
H
X
L
H
L
H
BA
BA
L
Col.
Read with Auto Precharge
READA
H
X
L
H
L
H
BA
BA
H
Col.
Write Command
WRITE
H
X
L
H
L
L
BA
BA
L
Col.
Write Command with Auto Precharge WRITEA
H
X
L
H
L
L
BA
BA
H
Col.
Burst Stop
BST
H
X
L
H
H
L
X
X
X
X
Precharge Single Bank
PRE
H
X
L
L
H
L
BA
BA
L
X
Precharge All Banks
PREAL
H
X
L
L
H
L
X
X
H
X
Auto Refresh
AREF
H
H
L
L
L
H
X
X
X
X
Self Refresh Entry
SREFEN
H
L
L
L
L
H
X
X
X
X
Self Refresh Exit
SREFEX
L
L
H
H
H
L
X
H
X
H
X
H
X
X
X
X
X
X
X
X
Power Down Mode Entry
(Note 1)
PWDNEN
H
H
L
L
H
L
X
H
X
H
X
H
X
X
X
X
X
X
X
X
Power Down Mode Exit
PWDNEX
L
H
H
L
X
valid
X
valid
X
valid
X
X
X
X
4.2
Function Truth Table I
Table 10
Function Truth Table I
Current
State
Command
Address
Action
Notes
IDLE
DESEL
X
NOP
3
NOP
X
NOP
3
BST
X
NOP
3
READ / READA
BA,CA,A8
ILLEGAL
1
WRITE / WRITEA
BA,CA,A8
ILLEGAL
1
ACT
BA, RA
Bank Active
PRE / PREAL
BA, A8
NOP
AREF / SREF
X
AUTO-Refresh or Self-Refresh
4
MRS / EMRS
Op-Code
Mode Register Set or Extended Mode Register Set
ROW
ACTIVE
DESEL
X
NOP
NOP
X
NOP
BST
X
NOP
READ / READA
BA, CA, A8
Begin Read, Determine Auto Precharge
9
WRITE / WRITEA
BA, CA, A8
Begin Write, Determine Auto Precharge
9
ACT
BA, RA
ILLEGAL
1, 5
PRE / PREAL
BA, A8
Precharge / Precharge All
6
AREF / SREF
X
ILLEGAL
MRS / EMRS
OP-Code
ILLEGAL
READ
DESEL
X
Continue burst to end
NOP
X
Continue burst to end
BST
X
Terminate Burst
READ / READA
BA, CA, A8
Terminate burst, Begin New Read, Determine Auto-
Prechgarge
7
WRITE / WRITEA
BA, CA, A8
ILLEGAL
2, 7
ACT
BA, RA
ILLEGAL
1
PRE / PREAL
BA ,A8
Terminate Burst / Precharge
AREF / SREF
X
ILLEGAL
MRS / EMRS
Op-Code
ILLEGAL
READ with
Auto
Precharge
DESEL
X
Continue burst to end, Precharge
NOP
X
Continue burst to end, Precharge
BST
BA
ILLEGAL
READ / READA
BA, CA, A8
ILLEGAL
WRITE / WRITEA
BA, CA, A8
ILLEGAL
ACT
BA, RA
ILLEGAL
1
PRE / PREAL
BA ,A8
ILLEGAL
1
AREF / SREF
X
ILLEGAL
MRS / EMRS
Op-Code
ILLEGAL
WRITE
RECOVERING
DESEL
X
NOP (Row Active after tWR)
NOP
X
NOP (Row Active after tWR)
BST
X
NOP (Row Active after tWR)
READ / READA
BA, CA, A8
Begin Read, Determine Auto-Prechgarge
2
WRITE / WRITEA
BA, CA, A8
Begin Write, Determine Auto-Prechgarge
ACT
BA, RA
ILLEGAL
2
PRE / PREAL
BA ,A8
ILLEGAL
1, 10
AREF / SREF
X
ILLEGAL
MRS / EMRS
OP-Code
ILLEGAL
WRITE
RECOVERING
with AUTO-
PRECHARGE
DESEL
X
NOP (Precharge after tWR)
NOP
X
NOP (Precharge after tWR)
BST
X
NOP (Precharge after tWR)
READ / READA
BA, CA, A8
ILLEGAL
1, 2
WRITE / WRITEA
BA, CA, A8
ILLEGAL
1
ACT
BA, RA
ILLEGAL
1
PRE / PREAL
BA ,A8
ILLEGAL
1
AREF / SREF
X
ILLEGAL
MRS / EMRS
OP-Code
ILLEGAL
REFRESH
DESEL
X
NOP (Idle after tRC)
NOP
X
NOP (Idle after tRC)
BST
X
NOP (Idle after tRC)
READ / READA
BA, CA, A8
ILLEGAL
WRITE / WRITEA
BA, CA, A8
ILLEGAL
ACT
BA, RA
ILLEGAL
11
PRE / PREAL
BA ,A8
ILLEGAL
AREF / SREF
X
ILLEGAL
MRS / EMRS
OP-Code
ILLEGAL
(EXTENDED)
MODE
REGISTER
SET
DESEL
X
NOP (Idle after two clocks)
NOP
X
NOP (Idle after two clocks)
BST
X
NOP (Idle after two clocks)
READ / READA
BA, CA, A8
ILLEGAL
WRITE / WRITEA
BA, CA, A8
ILLEGAL
ACT
BA, RA
ILLEGAL
PRE / PREAL
BA ,A8
ILLEGAL
AREF / SREF
X
ILLEGAL
MRS / EMRS
OP-Code
ILLEGAL
Table 10
Function Truth Table I
Current
State
Command
Address
Action
Notes
WRITE
DESEL
X
Continue burst to end
NOP
X
Continue burst to end
BST
X
ILLEGAL
READ / READA
BA, CA, A8
Terminate Burst, Begin Read, Determine Auto-
Precharge.
7, 8
WRITE / WRITEA
BA, CA, A8
Terminate Burst, Begin new Write, Determine Auto-
Precharge
2, 7
ACT
BA, RA
ILLEGAL
1
PRE / PREAL
BA ,A8
Terminate Burst , Precharge
8
AREF / SREF
X
ILLEGAL
MRS / EMRS
OP-Code
ILLEGAL
WRITE with
Auto
Precharge
DESEL
X
Continue burst to end, Precharge
NOP
X
Continue burst to end, Precharge
BST
X
ILLEGAL
READ / READA
BA, CA, A8
ILLEGAL
WRITE / WRITEA
BA, CA, A8
ILLEGAL
ACT
BA, RA
ILLEGAL
1
PRE / PREAL
BA ,A8
ILLEGAL
1
AREF / SREF
X
ILLEGAL
MRS / EMRS
OP-Code
ILLEGAL
ROW
ACTIVATING
DESEL
X
NOP ( Row Active after tRCD)
NOP
X
NOP ( Row Active after tRCD)
BST
X
NOP ( Row Active after tRCD)
READ / READA
BA, CA, A8
ILLEGAL
1, 9
WRITE / WRITEA
BA, CA, A8
ILLEGAL
1, 9
ACT
BA, RA
ILLEGAL
1, 5
PRE / PREAL
BA ,A8
ILLEGAL
1, 6
AREF / SREF
X
ILLEGAL
MRS / EMRS
OP-Code
ILLEGAL
PRECHARGE
DESEL
X
NOP ( Row Idle after tRP)
NOP
X
NOP ( Row Idle after tRP)
BST
X
NOP ( Row Idle after tRP)
READ / READA
BA, CA, A8
ILLEGAL
1
WRITE / WRITEA
BA, CA, A8
ILLEGAL
1
ACT
BA, RA
ILLEGAL
1
PRE / PREAL
BA ,A8
NOP ( Row Idle after tRP)
1
AREF / SREF
X
ILLEGAL
MRS / EMRS
OP-Code
ILLEGAL
Table 10
Function Truth Table I
Current
State
Command
Address
Action
Notes