MSPM0G1107: MSPM0 SPI PICO pin

Hi Team,

I wanted to ask if upon initialization the SPI PICO pin is idle Hi-Z or forced?

In my code, it seems to be Hi-Z until data is sent to the buffer for transmit.

I read similar posts on e2e, this one:

https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1445621/mspm0l1105-rate-of-pico-is-slowly

is the same as what I see.

Further, in this e2e post, it seems like Luke Ledbetter has mentioned that the PICO pin is indeed Hi-Z when idle:

https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1516431/mspm0g3519-discrepancy-between-mspm0-trm-registers-and-example-code

The confusion is that in the TRM SPI description, it is said that the PICO is forced idle low.

In my configuration, Hi-Z = 0 and I can get PICO to stay idle low whenever PIPD = 1, however if PIPD = 0 then the PICO pin will eventually drift high.

The reason why the PICO eventually goes high is because I have a 100k external pull-up on the pin (required by my SPI pheripheral device). In the first link above, it seems like someone tried this and didn't see the issue, but I am pretty sure they didn't have an external pull-up.

So is the PICO idle state Hi-Z ?

Thank you,

Viktor.