AT91RM3400-AI-001 ATMEL [ATMEL Corporation], AT91RM3400-AI-001 Datasheet - Page 356
AT91RM3400-AI-001
Manufacturer Part Number
AT91RM3400-AI-001
Description
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT91RM3400-AI-001.pdf
(461 pages)
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External Event/Trigger
Conditions
Output Controller
356
AT91RM3400
An external event can be programmed to be detected on one of the clock sources (XC0, XC1,
XC2) or TIOB. The external event selected can then be used as a trigger.
The parameter EEVT parameter in TC_CMR selects the external trigger. The EEVTEDG
parameter defines the trigger edge for each of the possible external triggers (rising, falling or
both). If EEVTEDG is cleared (none), no external event is defined.
If TIOB is defined as an external event signal (EEVT = 0), TIOB is no longer used as an output
and the TC channel can only generate a waveform on TIOA.
When an external event is defined, it can be used as a trigger by setting bit ENETRG in
TC_CMR.
As in Capture Mode, the SYNC signal and the software trigger are also available as triggers.
RC Compare can also be used as a trigger depending on the parameter WAVSEL.
The output controller defines the output level changes on TIOA and TIOB following an event.
TIOB control is used only if TIOB is defined as output (not as an external event).
The following events control TIOA and TIOB: software trigger, external event and RC com-
pare. RA compare controls TIOA and RB compare controls TIOB. Each of these events can
be programmed to set, clear or toggle the output as defined in the corresponding parameter in
TC_CMR.
1790A–ATARM–11/03
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