MO SEL VITELIC
V53C816H
Truth Table
Function
RAS
LCAS UCAS
WE
X
OE
X
ADDRESS I/O
Notes
Standby
H
L
L
H
L
L
H
L
High-Z
ROW/COL Data Out
Read: Word
Read: Lower Byte
H
L
H
H
L
ROW/COL Lower Byte, Data-Out
Upper Byte, High-Z
Read: Upper Byte
L
H
L
H
L
ROW/COL Lower Byte, High-Z
Upper Byte, Data-Out
Write: Word (Early-Write)
Write: Lower Byte (Early)
L
L
L
L
L
L
L
X
X
ROW/COL Data-In
H
ROW/COL Lower Byte, Data-In
Upper Byte, High-Z
Read: Upper Byte (Early)
L
H
L
L
X
ROW/COL Lower Byte, High-Z
Upper Byte, Data-In
Read-Write
L
L
H→L
H→L
H→L
L
L
H→L
H→L
H→L
L
H→L
H
L→H
ROW/COL Data-Out, Data-In
1, 2
2
Fast Page-Mode Read
Fast Page-Mode Write
Fast Page-Mode Read-Write
Hidden Refresh Read
RAS-Only Refresh
CBR Refresh
L
L
X
COL
COL
COL
Data-Out
L
L
Data-In
2
L
L→H→L
L
H→L
H
L→H
L
Data-Out, Data-In
1, 2
2
ROW/COL Data-Out
H
H
X
X
ROW
High-Z
High-Z
H→L
L
L
X
X
3
Notes:
1. Byte write cycles LCAS or UCAS active.
2. Byte Read cycles LCAS or UCAS active.
3. Only one of the two CAS must be active (LCAS or UCAS).
V53C816H Rev. 1.3 February 1999
8
MOSEL [ MOSEL VITELIC, CORP ]
