Atar862-3, Figure 53, Figure 54 – Rainbow Electronics ATAR862-3 User Manual
Page 57: Figure 55
57
ATAR862-3
4556B–4BMCU–02/03
Figure 53.
Counter Reset with Each Compare Match
Figure 54.
Counter Reset with Compare Register 2 and Toggle with Start
Figure 55.
Single Action of Compare Register 1
Timer 3 – Mode 2:
Timer/Counter, External
Trigger Restart and External
Capture (with T3I Input)
The counter is driven by an internal clock source. After starting with T3R, the first edge
from the external input T3I starts the counter. The following edges at T3I load the cur-
rent counter value into the capture register, reset the counter and restart it. The edge
can be selected by the programmable edge decoder of the timer input stage. If single-
action mode is activated for one or both compare registers the trigger signal restarts the
single action.
0
0
0
0
1
2
3
5
1
2
3
4
0
0
1
2
3
1
2
T3R
Counter 3
CM31
INT5
T3O
3
CM32
4
0
0
0
1
2
3
5
6
7
4
0
1
2
3
5
6
T3R
Counter 3
CM31
INT5
T3O
Toggle
by start
T3O
8
9
CL3
CM32
0 0 1 2 3 4 5 6 7 8 9 10 0 1 2
Counter 3
CM31
CM32
T3O
0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1
Toggle by start
T3R