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
Current State /CS /RAS /CAS /WE Address
IDLE
H
L
L
L
L
L
L
L
X
H
H
H
L
L
L
L
X
H
H
H
H
L
L
L
L
X
H
H
L
H
H
L
L
X
H
H
L
L
H
H
L
L
X
H
L
X
H
L
H
L
X
H
L
H
L
H
L
H
L
X
X
BA
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 /
WRITE
ACT
PRE /
PREA
REFA
MRS
DESEL
NOP
TBST
READ /
READA
WRITE /
WRITEA
ACT
PRE /
PREA
REFA
MRS
NOP
NOP
ILLEGAL*2
ILLEGAL*2
Bank Active, Latch RA
NOP*4
Auto-Refresh*5
Mode Register Set*5
NOP
NOP
NOP
Begin Read, Latch CA, Determine
Auto-Precharge
Begin Write, Latch CA, Determine
Auto-Precharge
Bank Active / ILLEGAL*2
Precharge / Precharge All
ILLEGAL
ILLEGAL
ROW
ACTIVE
H
L
L
L
L
L
L
L
L
JULY.2000
Page-7
Rev.2.2
VML [ VANGUARD INTERNATIONAL SEMICONDUCTOR ]
