Rainbow Electronics AT91CAP9S250A - Manual (Page 658)

658
6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
Figure 38-8. WAVSEL= 00 with trigger
38.5.11.2 WAVSEL = 10
When WAVSEL = 10, the value of TC_CV is incremented from 0 to the value of RC, then auto-
matically reset on a RC Compare. Once the value of TC_CV has been reset, it is then
incremented and so on. See
Figure 38-9 .
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 38-10 .
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 38-9. WAVSEL = 10 Without Trigger
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
Time
Counter Value
R
C
R
B
R
A
TIOB
TIOA
Counter cleared by compare match with RC
0xFFFF
Waveform Examples