Description
The JTAG connection to the device might fail at device-dependent low or high supply
voltage levels if the LPMx.5 debug support feature is enabled. To avoid a potentially
unreliable debug session or general issues with JTAG device connectivity and the
resulting bad customer experience Texas Instruments has chosen to remove the LPMx.5
debug support feature from common MSP430 IDEs including TIs Code Composer Studio
6.1.0 with msp430.emu updated to version 6.1.0.7 and IARs Embedded Workbench
6.30.2, which are based on the MSP430 debug stack MSP430.DLL 3.5.0.1
TI plans to re-introduce this feature in limited capacity in a future release of the debug
stack by providing an IDE override option for customers to selectively re-activate LPMx.5
debug support if needed. Note that the limitations and supply voltage dependencies
outlined in this erratum will continue to apply.
For additional information on how the LPMx.5 debug support is handled within the
MSP430 IDEs including possible workarounds on how to debug applications using
LPMx.5 without toolchain support refer to
Code Composer Studio User's Guide for
IAR Embedded Workbench User's Guide for MSP430 chapter
Workaround
1. If LPMx.5 debug support is deemed functional and required in a given scenario:
a) Do not update the IDE to continue using a previous version of the debug stack such as
MSP430.DLL v3.4.3.4.
OR
b) Roll back the debug stack by either performing a clean re-installation of a previous
version of the IDE or by manually replacing the debug stack with a prior version such as
MSP430.DLL v3.4.3.4 that can be obtained from
.
2. In case JTAG connectivity fails during the LPMx.5 debug mode, the device supply
voltage level needs to be raised or lowered until the connection is working.
Do not enable the LPMx.5 debug support feature during production programming.
JTAG27
JTAG Module
Category
Debug
Function
Unintentional code execution after programming via JTAG/SBW
Description
The device can unintentionally start executing code from uninitialized RAM addresses
0x0006 or 0x0008 after being programming via the JTAG or SBW interface. This can
result in unpredictable behavior depending on the contents of the address location.
Workaround
1. If using programming tools purchased from TI (MSP-FET, LaunchPad), update to CCS
version 6.1.3 later or IAR version 6.30 or later to resolve the issue.
2. If using the MSP-GANG Production Programmer, use v1.2.3.0 or later.
3. For custom programming solutions refer to the specification on MSP430 Programming
Via the JTAG Interface User's Guide (SLAU320) revision V or newer and use
MSPDebugStack v3.7.0.12 or later.
For MSPDebugStack (MSP430.DLL) in CCS or IAR, download the latest version of the
development environment or the latest version of the
Advisory Descriptions
SLAZ339AF – OCTOBER 2012 – REVISED MAY 2021
MSP430F6721 Microcontroller
15
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