MOSEL VITELIC
Truth Table
Function
Standby
Read: Word
Read: Lower Byte
V53C816H
RAS
H
L
L
LCAS
H
L
L
UCAS
H
L
H
WE
X
H
H
OE
X
L
L
ADDRESS I/O
High-Z
ROW/COL
ROW/COL
Data Out
Lower Byte, Data-Out
Upper Byte, High-Z
Lower Byte, High-Z
Upper Byte, Data-Out
Data-In
Lower Byte, Data-In
Upper Byte, High-Z
Lower Byte, High-Z
Upper Byte, Data-In
Data-Out, Data-In
Data-Out
Data-In
Data-Out, Data-In
Data-Out
High-Z
High-Z
Notes
Read: Upper Byte
L
H
L
H
L
ROW/COL
Write: Word (Early-Write)
Write: Lower Byte (Early)
L
L
L
L
L
H
L
L
X
X
ROW/COL
ROW/COL
Read: Upper Byte (Early)
L
H
L
L
X
ROW/COL
Read-Write
Fast Page-Mode Read
Fast Page-Mode Write
Fast Page-Mode Read-Write
Hidden Refresh Read
RAS-Only Refresh
CBR Refresh
L
L
L
L
L→H→L
L
H→L
L
H→L
H→L
H→L
L
H
L
L
H→L
H→L
H→L
L
H
L
H→L
H
L
H→L
H
X
X
L→H
L
X
L→H
L
X
X
ROW/COL
COL
COL
COL
ROW/COL
ROW
1, 2
2
2
1, 2
2
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 ]
