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MSP432 Rev C - JTAG connection Issue (BSL and LPM4.5)

Hello Everyone,

Background Information:

  • If the device is empty/ereased, the ROM boot-code will invoke the BSL.
  • After 10 seconds, the BSL will enter LPM4.5 and switch all port pins (including PJ – JTAG port) to input in case no BSL command was received.
  • The debugger will give you an error when you try to connect after this.

Error Messages:

  • CCS:


  • KEILuVision:

In this state the device can only be opened with SWD (An example on how to change to SWD is described in chapter 5 FAQ - I can't program my LaunchPad development kit) or by a power cycle and trying to reconnect within the 10 seconds window

BSL versions:
BSL 0000.0003.0006.0203.0008 is affected  (Rev C MSP material)
BSL 0000.0002.0004.0103.0004 (Rev C XMS material) and older are not affected

You can read out the BSL version at address 0x202000 in 8 bit hex style.

A new BSL version is planned and as soon as it is available this post will be updated.

Thanks and regards,


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