I'm working on ADC module in MPC5748G and want to use an external trigger to start ADC injected conversion.
I'm using MPC5748GRM Rev. 6, 10/2017, at https://www.nxp.com/docs/en/reference-manual/MPC5748GRM.pdf
And It describes at 188.8.131.52.1 Starting injected conversion
To start an injected conversion via external trigger, enable external triggering by setting MCR[JTRGEN]=1. A programmed event (rising/falling edge depending on MCR[JEDGE] bit) on the injection trigger input starts the injected conversion
But I can't find the external trigger source to generate trigger source.
Please help to figure out the external trigger source for ADC injected conversion.
P/S: The RM also describes BCTU trigger mode but as I understand It will not start an injected conversion.