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MSP430FR5739: MSP430F5438A & MSP430FR5739 BSL Access Password

Part Number: MSP430FR5739
Other Parts Discussed in Thread: MSP430F149

Hi team,

From the BSL app note SLAU319AD - Section 2.7,  it said the password for BSL access is the value from FFE0 to FFFF and 32 bytes in total.

With MSP430F149, 30 of the 32 bytes are fixed with same Firmware version, but there is still free space from FFE0 to FFE1. That allowed each unit to be shipped with a different BSL password.

With MSP430FR5379, and MSP430F5428A, there no free space anymore like with MSP430F149. It means all units with same firmware version will carry same password. Is there anyway we can still set different password on to units with the same firmware?

Also, do we recommend using the non-used interrupt vector as free space for randomize the password?

Thanks,

Jacob

  • Hi Jacob,

    Yes, you can use the non-used interrupt vector  for randomize the password.

    As you don't declare the interrupt functions for no-used interrupt vector, it will be OK to write customized number.

    I advice you to make a test as well to double check.

    Eason

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