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EK-TM4C123GXL: Port B and Port D pins are shorted together

Peter Borenstein
Mastermind 8695 points
Part Number: EK-TM4C123GXL

Port B pin 6 and Port D pin 0 are shorted by a 0 ohm resistor R9. Why are these pins shorted?

Shorting micro pins seems like an unreasonable thing to do and I wasted much time discovering this "feature".

  • 0
    Guru 117855 points

    You are correct Sir.     Thank vendor agents seeking to "support" their lesser/older MSP family (despite the arrival of Cortex M0, M0+) by providing "compatibility w/the past!"      (long past MSP Eval boards may benefit from the ability to "tie" to either Port B or Port D...)       Most here do NOT "dig as deeply as did you" - thus suffer the neat "aroma" of two tied outputs - one hi - other lo - delightful...

    Hundreds here have, "Fallen from that high, predictable cliff!"      Several of those here have LONG requested those resistors to be bagged (inserted by those who may need them (~0.1% of users))     Such suggestion "Rejected as too hard" - thus welcome to cliffside manor - good that you detected EARLY!