Triggered Mode

Triggered mode uses a clock or timer source to set a minimum time interval between successive data transfers. The trigger source is selected through the Scanner Data Trigger Input Selection (TSEL) bits. Triggered mode operation is the same as in Concurrent mode, except that the scanner will wait until it detects a rising-edge trigger event before performing a scan operation. The CPU operations are stalled while the scan is in progress and resume immediately after the scan completes. If the Scanner Busy Indicator (BUSY) bit is set and a trigger event occurs, the event will be ignored.

Note: The trigger source must be active for scanner operation to complete.