MSC23S4721E Ver la hoja de datos (PDF) - Oki Electric Industry
Número de pieza
componentes Descripción
Fabricante
MSC23S4721E Datasheet PDF : 11 Pages
| |||
MSC23S4721E-8BS18 (98.07.17)
FUNCTION TRUTH TABLE (Table1)(2/2)
Current State
Precharge
/CS
H
L
/RAS
X
H
/CAS
X
H
/WE BA
XX
HX
ADDR
X
X
Æ NOP Idle after tRP
Æ NOP Idle after tRP
Action
L
H
H
L BA
X
ILLEGAL 2
L
H
L
X BA
CA
ILLEGAL 2
L
L
H
H BA
RA
ILLEGAL 2
L
L
H
L BA
A10
NOP 4
L
L
L
XX
X
ILLEGAL
Write
H
X
X
XX
X
NOP
Recovery
L
H
H
HX
X
NOP
L
H
H
L BA
X
ILLEGAL 2
L
H
L
X BA
CA
ILLEGAL 2
L
L
H
H BA
RA
ILLEGAL 2
L
L
H
L BA
A10
ILLEGAL 2
L
L
L
XX
X
ILLEGAL
Row Active
H
X
X
XX
X
NOP Row Active after tRCD
L
H
H
HX
X
NOP Row Active after tRCD
L
H
H
L BA
X
ILLEGAL 2
L
H
L
X BA
CA
ILLEGAL 2
L
L
H
H BA
RA
ILLEGAL 2
L
L
H
L BA
A10
ILLEGAL 2
Refresh
L
H
L
L
X
H
L
XX
X
XX
H
XX
X
X
X
ILLEGAL
Æ NOP Idle after tRC
Æ NOP Idle after tRC
L
H
L
XX
X
ILLEGAL
L
L
H
XX
X
ILLEGAL
L
L
L
XX
X
ILLEGAL
Mode Resister
H
X
X
XX
X
NOP
Access
L
H
H
HX
X
NOP
L
H
H
LX
X
ILLEGAL
L
H
L
XX
X
ILLEGAL
L
L
X
XX
X
ILLEGAL
ABBREVIATIONS
RA = Row Address
CA = Column Address
BA = Bank Address
AP = Auto Precharge
NOP = No Operation command
Notes:
1. All inputs will be enabled when CKE is set high for at least 1 cycle prior to the inputs.
2. Illegal to bank in specified state, but may be legal in some cases depending on the state of
bank selection.
3. Satisfy the timing of tCCD and tWR to prevent bus contention.
4. NOP to bank precharging or in idle state. Precharges activated bank by BA or A10.
5. Illegal if any bank is not idle.
Page 10/11
Share Link: 