PD45128441-I Datasheet, PDF (16/89 Pages) Elpida Memory – 128M-bit Synchronous DRAM 4-bank, LVTTL WTR (Wide Temperature Range)

µPD45128441-I, 45128841-I, 45128163-I
4.4 Operative Command Table ^Note1
(1/3)
Current state
Idle
Row active
Read
Write
/CS /RAS /CAS /WE Address
H × × ××
L H H ××
L H L H BA, CA, A10
L H L L BA, CA, A10
L L H H BA, RA
L L H L BA, A10
L L L H×
L L L L Op-Code
H × × ××
L H H ××
L H L H BA, CA, A10
L H L L BA, CA, A10
L L H H BA, RA
L L H L BA, A10
L L L H×
L L L L Op-Code
H × × ××
L H H H×
L H H L×
L H L H BA, CA, A10
L H L L BA, CA, A10
L L H H BA, RA
L L H L BA, A10
L L L H×
L L L L Op-Code
H × × ××
L H H H×
L H H L×
L H L H BA, CA, A10
L H L L BA, CA, A10
L L H H BA, RA
L L H L BA, A10
L L L H×
L L L L Op-Code
Command
DESL
NOP or BST
READ/READA
WRIT/WRITA
ACT
PRE/PALL
REF/SELF
MRS
DESL
NOP or BST
READ/READA
WRIT/WRITA
ACT
PRE/PALL
REF/SELF
MRS
DESL
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PALL
REF/SELF
MRS
DESL
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PALL
REF/SELF
MRS
Action
Notes
Nop or power down
2
Nop or power down
2
ILLEGAL
3
ILLEGAL
3
Row activating
Nop
CBR (auto) refresh or self refresh
4
Mode register accessing
Nop
Nop
Begin read : Determine AP
5
Begin write : Determine AP
5
ILLEGAL
3
Precharge
6
ILLEGAL
ILLEGAL
Continue burst to end → Row active
Continue burst to end → Row active
Burst stop → Row active
Terminate burst, new read : Determine AP 7
Terminate burst, start write : Determine AP 7, 8
ILLEGAL
3
Terminate burst, precharging
ILLEGAL
ILLEGAL
Continue burst to end → Write recovering
Continue burst to end → Write recovering
Burst stop → Row active
Terminate burst, start read : Determine AP 7, 8
Terminate burst, new write : Determine AP 7
ILLEGAL
3
Terminate burst, precharging
9
ILLEGAL
ILLEGAL
16
Preliminary Data Sheet E0233N10