VG36648041DTL-8H Ver la hoja de datos (PDF) - Unspecified
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VG36648041DTL-8H Datasheet PDF : 69 Pages
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VIS
VG36644041DT / VG36648041DT / VG36641641DT
CMOS Synchronous Dynamic RAM
2.4 Operative Command Table (note 1)
HCurrent state CS RAS CAS WE Address
Command
Action
(1/3)
Notes
Idle
H X X XX
DESL
Nop or Power down
2
L H H XX
NOP or BST Nop or Power down
2
L H L H BA, CA, A10 READ/READA ILLEGAL
3
L H L L BA, CA, A10 WRIT/WRITA ILLEGAL
3
L L H H BR, RA
ACT
Row active
L L H L BA, A10
PRE/PALL
Nop
L L L HX
REF/SELF
Refresh or Self refresh
4
L L L L Op-Code
MPS
Mode register access
Row active
H X X XX
DESL
Nop
L H H XX
NOP or BST Nop
L H L H BA, CA, A10 READ/READA Begin read : Determine AP
5
L H L L BA, CA, A10 WRIT/WRITA Begin write : Determine AP
5
L L H H BA, RA
ACT
ILLEGAL
3
L L H L BA, A10
PRE/PALL
Precharge
6
L L L HX
REF/SELF
ILLEGAL
L L L L Op-Code
MRS
ILLEGAL
Read
H X X XX
DESL
Continue burst to end → Row active
L H H HX
NOP
Continue burst to end → Row active
L H H LX
BST
Burst stop → Row active
L H L H BA, CA, A10 READ/READA Term burst, new read : Determine AP
7
L H L L BA, CA, A10 WRIT/WRITA Term burst, start write : Determine AP
7,8
L L H H BA, RA
ACT
ILLEGAL
3
L L H L BA, A10
PRE/PALL
Term burst, precharging
L L L HX
REF/SELF
ILLEGAL
L L L L Op-Code
MRS
ILLEGAL
Write
H X X XX
DESL
Continue burst to end → write recovering
L H H HX
NOP
Continue burst to end → write recovering
L H H LX
BST
Burst stop → Row active
L H L H BA, CA, A10 READ/READA Term burst, start read : Determine AP
7,8
L H L L BA, CA, A10 WRIT/WRITA Term burst, new write : Determine AP
7
L L H H BA, RA
ACT
ILLEGAL
3
L L H L BA, A10
PRE/PALL
Term burst, precharging
9
L L L HX
REF/SELF
ILLEGAL
L L L L Op-Code
MRS
ILLEGAL
Document :1G5-0177
Rev.2
Page 11
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