at91rm3400 ATMEL Corporation, at91rm3400 Datasheet - Page 352

• Manufacturer Part Number: at91rm3400
• Description: Atmel Advanced At91 Arm Microcontroller
• Manufacturer: ATMEL Corporation

WAVSEL = 00
352
AT91RM3400
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 Figure 143.
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 Figure 144.
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).
Figure 143. WAVSEL= 00 without trigger
Figure 144. WAVSEL= 00 with trigger
Waveform Examples
0xFFFF
Counter Value
R
R
R
TIOB
TIOA
C
B
A
Waveform Examples
0xFFFF
R
R
TIOB
TIOA
Counter Value
R
C
B
A
Counter cleared by compare match with 0xFFFF
Counter cleared by compare match with 0xFFFF
Counter cleared by trigger
Time
1790A–ATARM–11/03
Time