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MSP430G2201: MSP430G2201 outputs seem to have a high impedance

Other Parts Discussed in Thread: MSP430G2210, MSP430FR5739

EDIT:  Disregard.  My apologies

 

  • Is the previous part used the MSP430G2210? A G2010 variant does not exist. Since the issue resolves itself after the first pulse and is based off of a previous BSL solution then this would appear to be a software issue or G22x1-specific errata. Can you provide any oscilloscope screenshots of the issue? A schematic, layout image, and code excerpt of driving the TEST pin would also be appreciated. Would it be a viable workaround to use a dummy TEST toggle to bypass the problem?

    Regards,
    Ryan
  • The problem appears to not be with the G2201 after all.  Test cable had a wire to a wrong pin.  What you see here is Yellow /RST and Blue TEST on the 5739.  This follows the BSL Start pattern for a shared JTAG, and is what we used with the previous cpu.  But for some reason, the MSP430FR5739 doesn't enter BSL -- it simply resets.  So I've been chasing a ghost -- the real problem lies in why the 5739 isn't reseting like it should.  I'm currently chasing the possibility that TEST isn't hooked up to the right pin, but the schematic looks right.

  • I just solved it.

    Problem was, the second processor was 10ms later turning the port back to normal. But the Direction port got changed back after the output -- thus I was hitting RESET a second time by accident.

    Thank you for all your help.
  • Thank you for quickly responding and providing the solution.

    Regards,
    Ryan

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