
1-11
IC
VGN-S36C/S36GP/S36LP/S36SP/S36TP/S38CP/S52B/
S62PS/S62PSY/S62S/S350F/S350FP/S360/S360P/S370F
(J/AM/AO)
Confidential
OPERATION COMMAND TRUTH TABLE - I
Current
State /CS /RAS /CAS /WE Address Command Action
IDLE
HXXX X DSEL NOP or power down
3
LHHH X NOP NOP or power down
3
LHHL X BST ILLEGAL
4
L H L H BA, CA, AP READ/READAP ILLEGAL
4
L H L L BA, CA, AP WRITE/WRITEAP ILLEGAL
4
L L H H BA, RA ACT Row Activation
L L H L BA, AP PRE/PALL NOP
LLLH X AREF/SREF Auto Refresh or Self Refresh
5
L L L L OPCODE MRS Mode Register Set
ROW
ACTIVE
HXXX X DSEL NOP
LHHH X NOP NOP
LHHL X BST ILLEGAL
4
L H L H BA, CA, AP READ/READAP Begin read : optional AP
6
L H L L BA, CA, AP WRITE/WRITEAP Begin write : optional AP
6
LLHHBA,RA ACT ILLEGAL
4
LLHL BA,AP PRE/PALL Precharge
7
LLLH X AREF/SREF ILLEGAL
11
LLLLOPCODE MRS ILLEGAL
11
READ
H X X X X DSEL Continue burst to end
L H H H X NOP Continue burst to end
L H H L X BST Terminate burst
L H L H BA, CA, AP READ/READAP Term burst, new read:optional AP
8
L H L L BA, CA, AP WRITE/WRITEAP ILLEGAL
LLHHBA,RA ACT ILLEGAL
4
L L H L BA, AP PRE/PALL Term burst, precharge
LLLH X AREF/SREF ILLEGAL
11
LLLLOPCODE MRS ILLEGAL
11
WRITE
H X X X X DSEL Continue burst to end
L H H H X NOP Continue burst to end
LHHL X BST ILLEGAL
4
L H L H BA, CA, AP READ/READAP Term burst, new read:optional AP
8
L H L L BA, CA, AP WRITE/WRITEAP Term burst, new write:optional AP
OPERATION COMMAND TRUTH TABLE - II
Current
State /CS /RAS /CAS /WE Address Command Action
WRITE
LLHHBA,RA ACT ILLEGAL
4
L L H L BA, AP PRE/PALL Term burst, precharge
LLLH X AREF/SREF ILLEGAL
11
LLLLOPCODE MRS ILLEGAL
11
READ
WITH
AUTOPRE-
CHARGE
H X X X X DSEL Continue burst to end
L H H H X NOP Continue burst to end
LHHL X BST ILLEGAL
L H L H BA, CA, AP READ/READAP ILLEGAL
10
L H L L BA, CA, AP WRITE/WRITEAP ILLEGAL
10
LLHHBA,RA ACT ILLEGAL
4,10
LLHL BA,AP PRE/PALL ILLEGAL
4,10
LLLH X AREF/SREF ILLEGAL
11
LLLLOPCODE MRS ILLEGAL
11
WRITE
AUTOPRE-
CHARGE
H X X X X DSEL Continue burst to end
L H H H X NOP Continue burst to end
LHHL X BST ILLEGAL
L H L H BA, CA, AP READ/READAP ILLEGAL
10
L H L L BA, CA, AP WRITE/WRITEAP ILLEGAL
10
LLHHBA,RA ACT ILLEGAL
4,10
LLHL BA,AP PRE/PALL ILLEGAL
4,10
LLLH X AREF/SREF ILLEGAL
11
LLLLOPCODE MRS ILLEGAL
11
PRE-
CHARGE
H X X X X DSEL NOP-Enter IDLE after tRP
L H H H X NOP NOP-Enter IDLE after tRP
LHHL X BST ILLEGAL
4
L H L H BA, CA, AP READ/READAP ILLEGAL
4,10
L H L L BA, CA, AP WRITE/WRITEAP ILLEGAL
4,10
LLHHBA,RA ACT ILLEGAL
4,10
L L H L BA, AP PRE/PALL NOP-Enter IDLE after tRP
LLLH X AREF/SREF ILLEGAL
11
LLLLOPCODE MRS ILLEGAL
11
OPERATION COMMAND TRUTH TABLE - III
Current
State /CS /RAS /CAS /WE Address Command Action
ROW
ACTIVATING
H X X X X DSEL NOP - Enter ROW ACT after tRCD
L H H H X NOP NOP - Enter ROW ACT after tRCD
LHHL X BST ILLEGAL
4
L H L H BA, CA, AP READ/READAP ILLEGAL
4,10
L H L L BA, CA, AP WRITE/WRITEAP ILLEGAL
4,10
LLHHBA,RA ACT ILLEGAL
4,9,10
LLHL BA,AP PRE/PALL ILLEGAL
4,10
LLLH X AREF/SREF ILLEGAL
11
LLLLOPCODE MRS ILLEGAL
11
WRITE
RECOVERING
H X X X X DSEL NOP - Enter ROW ACT after tWR
L H H H X NOP NOP - Enter ROW ACT after tWR
LHHL X BST ILLEGAL
4
L H L H BA, CA, AP READ/READAP ILLEGAL
L H L L BA, CA, AP WRITE/WRITEAP ILLEGAL
LLHHBA,RA ACT ILLEGAL
4,10
LLHL BA,AP PRE/PALL ILLEGAL
4,11
LLLH X AREF/SREF ILLEGAL
11
LLLLOPCODE MRS ILLEGAL
11
WRITE
RECOVERING
WITH
AUTOPRE-
CHARGE
H X X X X DSEL NOP - Enter precharge after tDPL
L H H H X NOP NOP - Enter precharge after tDPL
LHHL X BST ILLEGAL
4
L H L H BA, CA, AP READ/READAP ILLEGAL
4,8,10
L H L L BA, CA, AP WRITE/WRITEAP ILLEGAL
4,10
LLHHBA,RA ACT ILLEGAL
4,10
LLHL BA,AP PRE/PALL ILLEGAL
4,11
LLLH X AREF/SREF ILLEGAL
11
LLLLOPCODE MRS ILLEGAL
11
REFRESHING
H X X X X DSEL NOP - Enter IDLE after tRC
L H H H X NOP NOP - Enter IDLE after tRC
LHHL X BST ILLEGAL
11
L H L H BA, CA, AP READ/READAP ILLEGAL
11
OPERATION COMMAND TRUTH TABLE - IV
Note :
1. H - Logic High Level, L - Logic Low Level, X - Don’t Care, V - Valid Data Input,
BA - Bank Address, AP - AutoPrecharge Address, CA - Column Address, RA - Row Address, NOP - NO Operation.
2. All entries assume that CKE was active(high level) during the preceding clock cycle.
3. If both banks are idle and CKE is inactive(low level), then in power down mode.
4. Illegal to bank in specified state. Function may be legal in the bank indicated by Bank Address(BA) depending on the state of
that bank.
5. If both banks are idle and CKE is inactive(low level), then self refresh mode.
6. Illegal if tRCD is not met.
7. Illegal if tRAS is not met.
8. Must satisfy bus contention, bus turn around, and/or write recovery requirements.
9. Illegal if tRRD is not met.
10. Illegal for single bank, but legal for other banks in multi-bank devices.
11. Illegal for all banks.
Current
State /CS /RAS /CAS /WE Address Command Action
WRITE
L H L L BA, CA, AP WRITE/WRITEAP ILLEGAL
11
LLHHBA,RA ACT ILLEGAL
11
LLHL BA,AP PRE/PALL ILLEGAL
11
LLLH X AREF/SREF ILLEGAL
11
LLLLOPCODE MRS ILLEGAL
11
MODE
REGISTER
ACCESSING
H X X X X DSEL NOP - Enter IDLE after tMRD
L H H H X NOP NOP - Enter IDLE after tMRD
LHHL X BST ILLEGAL
11
L H L H BA, CA, AP READ/READAP ILLEGAL
11
L H L L BA, CA, AP WRITE/WRITEAP ILLEGAL
11
LLHHBA,RA ACT ILLEGAL
11
LLHL BA,AP PRE/PALL ILLEGAL
11
LLLH X AREF/SREF ILLEGAL
11
LLLLOPCODE MRS ILLEGAL
11