21.5.3 Event Control
| Name: | EVCTRL |
| Offset: | 0x04 |
| Reset: | 0x00 |
| Property: | - |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| FILTER | EDGE | CAPTEI | |||||||
| Access | R/W | R/W | R/W | ||||||
| Reset | 0 | 0 | 0 |
Bit 6 – FILTER Input Capture Noise Cancellation Filter
Writing this bit to '1' enables the input capture noise cancellation unit.
Bit 4 – EDGE Event Edge
This bit is used to select the Event edge. The effect of this bit is dependent on the selected Count Mode (CNTMODE) in TCB.CTRLB.
| Count Mode | EDGE | Positive Edge | Negative Edge |
|---|---|---|---|
| Periodic Interrupt Mode | 0 | Not Applicable | Not Applicable |
| 1 | Not Applicable | Not Applicable | |
| Timeout Check Mode | 0 | Start counter | Stop counter |
| 1 | Stop counter | Start counter | |
| Input Capture on Event Mode | 0 | Input capture frequency and pulse width measurement mode | Not Applicable |
| 1 | Not Applicable | Capture = count | |
| Input Capture Frequency Measurement Mode | 0 | Capture = count, initialize, interrupt | Not Applicable |
| 1 | Not Applicable | Capture = count, initialize, interrupt | |
| Input Capture Pulse Width Measurement Mode | 0 | Initialize | Capture = count, interrupt |
| 1 | Capture = count, interrupt | Initialize | |
| Input Capture Frequency and Pulse Width Measurement Mode | 0 |
On 1st Positive: initialize On following Negative: capture 2nd Positive: stop, interrupt |
|
| 1 |
On 1st Negative: initialize On following Positive: capture 2nd Negative: stop, interrupt |
||
| Single Shot Mode | 0 | Start counter | Not Applicable |
| 1 | Start counter | Start counter | |
| 8-bit PWM Mode | 0 | Not Applicable | Not Applicable |
| 1 | Not Applicable | Not Applicable | |
Bit 0 – CAPTEI Capture Event Input Enable
Writing this bit to '1' enables the event input capture.