Functions of the board APCI-3xxx
(standard)
48
Upwards counter
Fig. 8-8: Run down of the upwards counter
After reaching the reload value, the counting value is set on 0 and continues
to be counted. At an overflow an interrupt can be generated.
Downwards counter
Fig. 8-9: Run down of the downwards counter
In order to get the same counting value as in the upwards mode, the reload
value must be set on 3. The counter counts down to 0 and will be reset to the
reload value from the next edge cycle on.
