W65C22S Datasheet, PDF (16/46 Pages) List of Unclassifed Manufacturers – Versatile Interface Adapter (VIA)

The Western Design Center, Inc.
W65C22S Data Sheet
Table 1-8 Auxiliary Control Register Format and Operation ($0B)
7
6
T1 Timer Control
7
0
0
1
1
5
4
3
2
1
T2 Timer
Shift Register Control
PB
Control
T1 Timer Control
6 Operation
PB7
0 Timed interrupt each time T1
is loaded
Disabled
1 Continuous interrupts
0 Timed interrupt each time T1 One shot output
is loaded
1 Continuous interrupts
Square wave output
0
ACR
PA
T2 Timer Control
5
Operation
0
Timed interrupt
1
Count down with pulses on PB6
Shift Register Control
4
3 2 Operation
0
0 0 Disabled
0
0 1 Shift in under control of T2
0
1 0 Shift in under control of PHI2
0
1 1 Shift in under control of external clock
1
0 0 Shift out free-running at T2 rate
1
0 1 Shift out under control of T2
1
1 0 Shift out under control of PHI2
1
1 1 Shift out under control of external clock
Latch Enable/Disable
1
0 Operation
0
0 Disable
1
1 Enable latching
The Western Design Center
W65C22S
16