Datasheet

SAM3X / SAM3A [DATASHEET]
Atmel-11057C-ATARM-SAM3X-SAM3A-Datasheet_23-Mar-15
868
36.6.11.2 WAVSEL = 10
When WAVSEL = 10, the value of TC_CV is incremented from 0 to the value of RC, then automatically reset on a
RC Compare. Once the value of TC_CV has been reset, it is then incremented and so on. See Figure 36-9.
It is important to note that TC_CV can be reset at any time by an external event or a software trigger if both are
programmed correctly. See Figure 36-10.
In addition, RC Compare can stop the counter clock (CPCSTOP = 1 in TC_CMR) and/or disable the counter clock
(CPCDIS = 1 in TC_CMR).
Figure 36-9. WAVSEL = 10 without Trigger
Figure 36-10. WAVSEL = 10 with Trigger
Time
Counter Value
R
C
R
B
R
A
TIOB
TIOA
Counter cleared by compare match with RC
Waveform Examples
2
n
-1
(n = counter size)
Time
Counter Value
R
C
R
B
R
A
TIOB
TIOA
Counter cleared by compare match with RC
Waveform Examples
Counter cleared by trigger
2
n
-1
(n = counter size)