SAM4S_14 Datasheet, PDF (840/1231 Pages) ATMEL Corporation – ARM-based Flash MCU

37.6.11.2WAVSEL = 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 37-9.
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 37-10.
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 37-9. WAVSEL = 10 without Trigger
Counter Value
2ⁿ-1
(n = counter size)
R_C
Counter cleared by compare match with RC
R_B
R_A
Waveform Examples
TIOB
Time
TIOA
Figure 37-10. WAVSEL = 10 with Trigger
Counter Value
2ⁿ-1
(n = counter size)
Counter cleared by compare match with RC
R_C
Counter cleared by trigger
R_B
R_A
Waveform Examples
TIOB
Time
TIOA
840
SAM4S Series [DATASHEET]
Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14