LP-MSPM0C1104: Internal pullup resistors?

Cameron Wutzke

Part Number: LP-MSPM0C1104

Hey Team!

I recall the MSP430 had a hack-y way to use an internal current source to act like a pullup resistor for I2C. It was inadvisable though; only about ~1 device could go on the entire I2C bus since they weren't real pullups inside.

Does the M0 have a similar thing? This would help me as I use launchpads all the time when travelling to talk with chips. I often forget to bring resistors in my backpack

Thanks,

Cameron

over 1 year ago

+1 Keith Barkley over 1 year ago

Guru 42085 points

If you are lucky, you can use the pullups already on the board on PA0 and PA11. 8^)

0 Cameron Wutzke over 1 year ago in reply to Keith Barkley

TI__Expert 3552 points

Totally missed that J6 and J8 function- even better!

Really neat too the series resistors were added to help debugging. I'm thankful this was added. Thanks Keith

0 Keith Barkley over 1 year ago in reply to Cameron Wutzke

Guru 42085 points

I don't know about you, but the LP schematics are my friends, the MSP0G3507 LP has a *lot* of extraneous stuff added. I always get bit with the backchannel UART connections being jumpered (or not!) to the Boosterpack pins.

0 Sal Ye over 1 year ago in reply to Cameron Wutzke

TI__Mastermind 24475 points

Hi Cameron,

I should note PA0 and PA1 does not support internal pull-up resistor. And as Keith said, there already has external pull-up resistor on board.

As for other pins, GPIO can be used with GPIO internal pull-up resistor.

B.R.

Sal

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LP-MSPM0C1104: Internal pullup resistors?