Atmel Evaluation Kit AT91SAM9M10-G45-EK AT91SAM9M10-G45-EK Data Sheet

 645

SAM9M10 [DATASHEET]

6355F–ATARM–12-Mar-13

When WAVSEL = 00, the value of TC_CV is incremented from 0 to 0xFFFF. Once 0xFFFF has been reached, the
value of TC_CV is reset. Incrementation of TC_CV starts again and the cycle continues. See 

.

An external event trigger or a software trigger can reset the value of TC_CV. It is important to note that the trigger
may occur at any time. See 

RC Compare cannot be programmed to generate a trigger in this configuration. At the same time, RC Compare
can stop the counter clock (CPCSTOP = 1 in TC_CMR) and/or disable the counter clock (CPCDIS = 1 in
TC_CMR).

WAVSEL= 00 without trigger

WAVSEL= 00 with trigger

Time

Counter Value

R

C

R

B

R

A

TIOB

TIOA

Counter cleared by compare match with 0xFFFF

0xFFFF

Waveform Examples

Time

Counter Value

R

C

R

B

R

A

TIOB

TIOA

Counter cleared by compare match with 0xFFFF

0xFFFF

Waveform Examples

Counter cleared by trigger