LP-MSPM0G3507: Regarding information of PULL UP of UART in the board

Hi，

The UART pins do not need to pull up. Unless you are using PA0 and PA1, then you will need external pull up for those two pins. 

Internal pull up can be configured by the PINCM register.

Best regards,

Cash Hao

So I can use PA10 and PA11, and they need not to be pulled up externally. 

Right ? they are already pulled up?

Hi,

Yes, for PA10 and PA11 no need to pull up externally. And for UART function, there is also no need to pull up internally as well. 

Best regards,

Cash Hao

And what are the restriction for using the PA0 and PA1.
can you please explain that also, because it is not high drive.

Hi,

The PA0 and PA1 are open drain IO. So, it requires external pull up. And these two IOs are also 5V tolerant. You can pull these two pins up to 5V. 

Best regards,

Cash Hao 

Ok, in my application I’m pulling it to 3.3V, so for this no pull is required right ?

Yes. No pull is required.

Best regards,

Cash Hao