Hi Dave, What's the full MSP430 part number? The TCK, TMS, TDI, TDO, and TEST signals you describe are JTAG signals, which are used for debugging (during development) and programming (during development and at production) the device. Are these signals the only connections (besides power) between the MSP430 devices? Assuming they are and both master and daughter boards have already been programmed individually, you may be able to reconfigure the JTAG ports as general purpose I/O pins. On the daughter board, one pin could be pulled high (output). On the master board, configure the same pin to capture an interrupt from low to high (input) to detect when the daughter board gets connected. I'm sure there are more ways to implement this functionality, so other community members will most likely have some helpful recommendations as well. Regards, James MSP Customer Applications
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