STM32U5G9ZJT6Q project with SMPS disabled: how many GPIOs available ?

[Matbonny]

Hi, I'm in the process to design a board and an application based on the STM32U5G9ZJT6Q. I plan to disable the SMPS power supply. So I'll put the following pins to ground:

- VSSSMPS

- VDDSMPS

- VLXSMPS

I plan to utilize several GPIOs, about 90+. 

At page 19 of the MCU's datasheet, I read the following: GPIOs (without SMPS / with SMPS)  - NA/101 respectively.

Does this mean that I need to enable SMPS, in order to have the 101 available GPIOs ? 

Or can I run them with internal LDO instead, and still have the 101 GPIOs ? (which I'd prefer, for noise reasons). Power consumption is not an issue.

Thank you very much in advance !

Cheers

Matteo

[TDK · Accepted solution]

The STM32U5G9ZJT6Q is an "SMPS" chip in that it has a pinout which supports SMPS. It has 101 GPIOs whether or not you use the SMPS. The "NA" means there is no LQFP144 chip in a non-SMPS package, unlike the LQFP100 which has SMPS and non-SMPS packages and pinouts.

[Matbonny]

Thank you very much !