Hi Kean,
If what you are trying to accomplish is a SENT transmitter, FlexIO can theoretically generate SENT frames by using "Dual 8-bit counters PWM mode" with fixed low period and varying high period depending on the nibble value.
On the other hand, if you are trying to make a receiver, FlexIO won't work for you because it doesn't have "input capture" capability. You will need to use FlexTimer or LPTimer to measure each of pulse width.
Have a great day,
Felipe
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