Datasheet

655
32142D–06/2013
ATUC64/128/256L3/4U
A trigger such as an external event or a software trigger can modify CVn at any time. If a trigger
occurs while CVn is incrementing, CVn then decrements. If a trigger is received while CVn is
decrementing, CVn then increments. See Figure 26-11 on page 655.
RC Compare cannot be programmed to generate a trigger in this configuration.
At the same time, RC Compare can stop the counter clock (CMRn.CPCSTOP = 1) and/or dis-
able the counter clock (CMRn.CPCDIS = 1).
Figure 26-10. WAVSEL = 1 Without Trigger
Figure 26-11. WAVSEL = 1 With Trigger
Time
Counter Value
RC
RB
RA
TIOB
TIOA
Counter decremented by compare match
with 0xFFFF
0xFFFF
Waveform Examples
Time
Counter Value
TIOB
TIOA
Counter decremented by compare match with 0xFFFF
0xFFFF
Waveform Examples
Counter decremented by trigger
RC
RB
RA
Counter incremented by trigger