I can't find any information in the datasheet for the MSP430F248PM (= TQFP64) or for the family (document slau445g) on which pins to use for 2-wire programming. The chip has has no TEST/SBWTCK pin, or anything designated as it. I assume SBWTDIO goes to RST since the datasheet mentions the maximum pulldown cap being 1.1nF for this pin to use with SBW. But I can find absolutely no mention of what pin to use for TEST/SBWTCK . The 'F248 datasheet claims it supports 2-wire (and besides, why would it otherwise mention a RST pulldown cap limit for SBW). The only mention of SBWTCK in slau445g is in relation to LPM modes, but nothing else.