Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Data Sheet
Product codes
AT91SAM9N12-EK
667
SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]
11063K–ATARM–05-Nov-13
• EEVTEDG: External Event Edge Selection
• EEVT: External Event Selection
Signal selected as external event.
Note:
1. If TIOB is chosen as the external event signal, it is configured as an input and no longer generates waveforms and
subsequently no IRQs.
• ENETRG: External Event Trigger Enable
0: The external event has no effect on the counter and its clock.
1: The external event resets the counter and starts the counter clock.
Note:
Whatever the value programmed in ENETRG, the selected external event only controls the TIOA output and TIOB
if not used as an input (a trigger event input or other input used).
if not used as an input (a trigger event input or other input used).
• WAVSEL: Waveform Selection
• WAVE: Waveform Mode
0: Waveform Mode is disabled (Capture Mode is enabled).
1: Waveform Mode is enabled.
• ACPA: RA Compare Effect on TIOA
Value
Name
Description
0
NONE
None
1
RISING
Rising edge
2
FALLING
Falling edge
3
EDGE
Each edge
Value
Name
Description
TIOB Direction
0
TIOB
TIOB
Input
1
XC0
XC0
Output
2
XC1
XC1
Output
3
XC2
XC2
Output
Value
Name
Description
0
UP
UP mode without automatic trigger on RC Compare
1
UPDOWN
UPDOWN mode without automatic trigger on RC Compare
2
UP_RC
UP mode with automatic trigger on RC Compare
3
UPDOWN_RC
UPDOWN mode with automatic trigger on RC Compare
Value
Name
Description
0
NONE
None
1
SET
Set
2
CLEAR
Clear
3
TOGGLE
Toggle