at91sam9g20-cu ATMEL Corporation, at91sam9g20-cu Datasheet - Page 566

• Manufacturer Part Number: at91sam9g20-cu
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

Figure 34-11. WAVSEL = 01 Without Trigger
Figure 34-12. WAVSEL = 01 With Trigger
34.5.11.4
566
Waveform Examples
Waveform Examples
0xFFFF
0xFFFF
AT91SAM9G20 Preliminary
Counter Value
R
R
R
TIOB
TIOA
Counter Value
TIOB
TIOA
R
R
R
C
B
A
WAVSEL = 11
C
B
A
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
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
RC Compare can stop the counter clock (CPCSTOP = 1) and/or disable the counter clock (CPC-
DIS = 1).
Counter decremented by compare match with 0xFFFF
Counter decremented by compare match with 0xFFFF
Counter decremented
by trigger
Figure
34-14.
Counter incremented
by trigger
6384B–ATARM–15-Dec-08
Figure
Time
Time
34-13.