128Mb Synchronous DRAM
P2V28S20ATP-7,-75,-8 (4-BANK x 8,388,608-WORD x 4-BIT)
P2V28S30ATP-7,-75,-8 (4-BANK x 4,194,304-WORD x 8-BIT)
P2V28S40ATP-7,-75,-8 (4-BANK x 2,097,152-WORD x 16-BIT)
FUNCTION TRUTH TABLE (continued)
Current State
READ
/CS
H
L
L
L
L
L
L
L
L
/RAS /CAS /WE Address
X
H
H
H
H
L
L
L
L
X
H
H
H
H
L
L
L
L
X
H
H
L
L
H
H
L
L
X
H
H
L
L
H
H
L
L
X
H
L
H
L
H
L
H
L
X
H
L
H
L
H
L
H
L
X
X
BA
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
X
Op-Code,
Mode-Add
X
X
BA
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
X
Op-Code,
Mode-Add
Command Action
DESEL
NOP
TBST
READ
/READA
WRITE /
WRITEA
ACT
PRE /
PREA
REFA
MRS
DESEL
NOP
TBST
READ /
READA
WRITE /
WRITEA
ACT
PRE /
PREA
REFA
MRS
NOP (Continue Burst to END)
NOP (Continue Burst to END)
Terminate Burst
Terminate Burst, Latch CA,Begin
Read, Determine Auto-Precharge*3
Terminate Burst, Latch CA,Begin
Write, Determine Auto-Precharge*3
Bank Active / ILLEGAL*2
Terminate Burst, Precharge
ILLEGAL
ILLEGAL
NOP (Continue Burst to END)
NOP (Continue Burst to END)
Terminate Burst, Latch CA,Begin
Terminate Burst, Latch CA,Begin
Read, Determine Auto-Precharge*3
Terminate Burst, Latch CA,Begin
Write, Determine Auto-Precharge*3
Bank Active / ILLEGAL*2
Terminate Burst, Precharge
ILLEGAL
ILLEGAL
WRIT
E
H
L
L
L
L
L
L
L
L
JULY.2000
Page-8
Rev.2.2
VML [ VANGUARD INTERNATIONAL SEMICONDUCTOR ]
