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Original question:

How to us HET pins as GPIO?

TMS570LS1224: Need pin J5-18 (N2HET1[25]) in the LAUNCHXL2-TMS57012 to be a high Z input

Leslie Marquez
Genius 9401 points
Part Number: TMS570LS1224
Other Parts Discussed in Thread: LAUNCHXL2-TMS57012,

Hello,

I'm using LAUNCHXL2-TMS57012 with TMS570LS1224 MCU. 

I have pin J5-18 (N2HET1[25]) from the launchpad connected to a 100 kOhm pull down resistor and to an input on my BMS device. This pin needs to be low all the time in order for my BMS device to function properly, but when I connect to the MCU board and run the code, I see that the pin is being pulled high to 3.3V. 

How can I configure this pin to be a high Z input, or an input with a weak pull-down?

Best regards,

Leslie