Newer MSP430's use a two wire programming/debugging connection called "SPY-BI-WIRE
". The programming connection is a bit simpler than that for the PIC microcontroller. The PIC uses a three wire interface with a high programming voltage
, the MSP430 uses a two wire interface without the high programming voltage. This eliminates a diode from the programming header layout. Read more about PIC programming connections in my PIC programming tutorial
. The MSP430 programming pins are dedicated, they can't be used for general purpose IO.
This is the reset pin that already has a 47K resistor to power (R1). The programmer also exchange data on this pin during programming and debugging.
This is a dedicated pin for the programming and debugging clock signal.