V54C3256(16/80/40)4V(T/S/B)
SDRAM FUNCTION TRUTH TABLE(continued)
CURRENT
STATE
1
CS
RAS
CAS
WE
BS
Addr ACTION
X NOP (Continue Burst to End;> Precharge)
Write
H
L
L
L
L
L
L
L
X
X
X
X
X
with
Auto
H
H
H
H
L
H
H
L
H
L
X
NOP (Continue Burst to End;> Precharge)
BS
BS
X
X
ILLEGAL2
ILLEGAL2
ILLEGAL
ILLEGAL2
ILLEGAL2
ILLEGAL
Precharge
H
L
X
L
X
H
H
L
H
L
BS
BS
X
X
L
AP
X
L
X
Precharging
H
L
L
L
L
L
L
X
H
H
H
L
X
H
H
L
X
H
L
X
X
NOP;> Idle after tRP
NOP;> Idle after tRP
ILLEGAL2
X
X
BS
BS
BS
BS
X
X
X
H
L
X
ILLEGAL2
H
H
L
X
ILLEGAL2
NOP4
L
L
AP
X
X
ILLEGAL
Row
H
L
L
L
L
L
L
X
H
H
H
L
X
H
H
L
X
H
L
X
X
NOP;> Row Active after tRCD
NOP;> Row Active after tRCD
ILLEGAL2
Activating
X
X
BS
BS
BS
BS
X
X
X
H
L
X
ILLEGAL2
H
H
L
X
AP
X
ILLEGAL2
ILLEGAL2
L
L
X
ILLEGAL
Write
H
L
L
L
L
L
L
X
H
H
H
L
X
H
H
L
H
H
L
X
H
L
X
X
NOP
Recovering
X
X
NOP
BS
BS
BS
BS
X
X
ILLEGAL2
ILLEGAL2
ILLEGAL2
ILLEGAL2
ILLEGAL
X
H
L
X
X
L
AP
X
L
X
Refreshing
H
L
L
L
L
L
X
H
H
H
L
X
H
H
L
X
H
L
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
NOP;> Idle after tRC
NOP;> Idle after tRC
ILLEGAL
ILLEGAL
H
L
ILLEGAL
L
ILLEGAL
Mode
H
L
L
L
L
X
H
H
H
L
X
H
H
L
X
H
L
X
X
X
X
X
X
X
X
X
X
X
X
NOP
Register
NOP
ILLEGAL
ILLEGAL
ILLEGAL
Accessing
X
V54C3256(16/80/40)4V(T/S/B) Rev. 1.6 September 2002
47
MOSEL [ MOSEL VITELIC, CORP ]
