SLAZ291AC October   2012  – August 2021 MSP430F5500

 

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6.37 PORT30

PORT Module

Category

Functional

Function

Port J pins pulled up during RST and BOR

Description

Port J pins - PJ.1, PJ.2 and PJ.3 are unexpectedly pulled-up during a BOR or when a RST is active on the RSTNMI pin.
The pull-up on the impacted pins are de-activated when the device exits the reset state.
This issue does not occur if a BOR or RST takes place while the device is in LPM2 , LPM3 or LPM4.

Workaround

1) Use pins other than PJ.1, PJ.2 and PJ.3 for driving external components sensitive to voltage levels especially if BOR or RST events are expected in the application.
OR
2) If any of the three pins (PJ.1, PJ.2, and PJ.3) are used to drive external components sensitive to the pull-up, then use an external pull-down on these pins. Note that this will cause an increase in current consumption during the BOR or RST event.