SLAZ294AC October   2012  – August 2021 MSP430F5503

 

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6.20 JTAG20

JTAG Module

Category

Software in ROM

Function

BSL does not exit to application code

Description

The methods used to exit the BSL per MSP430 Programming Via the Bootstrap Loader (SLAU319) are invalid.

Workaround

To exit the BSL one of the following methods must be used.

- A Power cycle

or

- Toggle the TEST pin twice when nRST is high and after 50us pull nRST low.


GUID-20201119-CA0I-P1JP-MFZP-PDJ2H6LCDR4C-low.png



Note: This toggling of TEST pins is not subject to timing constraints. The appropriate level transitions on TEST pin, followed by a RST pulse after 50us, are sufficient to trigger an exit from BSL mode.