AT91SAM9260_1 Datasheet, PDF (526/798 Pages) ATMEL Corporation – AT91 ARM Thumb Microcontrollers

Figure 33-11. WAVSEL = 01 Without Trigger
Counter Value
Counter decremented by compare match with 0xFFFF
0xFFFF
R_C
R_B
R_A
Waveform Examples
TIOB
Time
TIOA
Figure 33-12. WAVSEL = 01 With Trigger
Counter Value
Counter decremented by compare match with 0xFFFF
0xFFFF
R_C
Counter decremented
by trigger
R_B
Counter incremented
by trigger
R_A
Waveform Examples
TIOB
Time
TIOA
33.6.11.4
WAVSEL = 11
When WAVSEL = 11, the value of TC_CV is incremented from 0 to RC. Once RC is reached, the
value of TC_CV is decremented to 0, then re-incremented to RC and so on. See Figure 33-13.
A trigger such as an external event or a software trigger can modify TC_CV at any time. If a trig-
ger occurs while TC_CV is incrementing, TC_CV then decrements. If a trigger is received while
TC_CV is decrementing, TC_CV then increments. See Figure 33-14.
RC Compare can stop the counter clock (CPCSTOP = 1) and/or disable the counter clock (CPC-
DIS = 1).
526 AT91SAM9260
6221I–ATARM–17-Jul-09