SLAZ384AH October   2012  – August 2021 MSP430FR5731

 

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6.29 PORT16

PORT Module

Category

Functional

Function

GPIO pins are driven low during device start-up

Description

During device start-up, all of the GPIO pins are expected to be in the floating input state. Due to this erratum, some of the GPIO pins are driven low for the duration of boot code execution during device start-up, if an external reset event (via the RST pin) interrupted the previous boot code execution. Boot code is always executed after a BOR, and the duration of this boot code execution is approximately 500us.

For a given device family, this erratum affects only the GPIO pins that are not available in the smallest package device family member, but that are present on its larger package variants.

Note: This erratum does not affect the smallest package device variants in a particular device family.

Workaround

Ensure that no external reset is applied via the RST pin during boot code execution of the device, which occurs 1us after device start-up.

Note: System application needs to account for this erratum in to ensure there is no increased current draw by the external components or damage to the external components in the system during device start-up.