Hi, all:
I use RM46L852 chip with TPS65381A-Q1 in my project.
If PWM pin(connecting to external device) of the RM is in a SHORT / OPEN condition, Can RM46L852 detect this error? Is there a method(software) to detect this error?
Best Regards
Daimb.
Hello,
If your concern is within the MCU, you can use internal loopback to monitor an N2HET output signal (PWM). For example, if a PWM is generated by HR structure 0 on Pin0, then you can use Pin1 to measure back the pulse length of the Pin0 PWM output signal using PCNT instruction. Loopback mode is activated between two high resolution structures by setting LBPSEL[x] to ‘1’ in the HETLBPSEL Register.
If you want detect if the signal trace is short or open, you can use external loopback using a wire/trace on the PCB. For example, if the PWM is used to drive a switch, the signal can be loopback from switch to a GPIO pin of MCU.
