stand alone programming MSP430F423 with only 6 pins(or less)

Development Boards MicroMod
1

I want to design a in-field programming interface between the prommer (e.g. MSP430-JTAG-ISO) and my device that has (due to space requirements) only 6 pins for programming, which means I have would to omit the Vcc_in and Vcc_out pins.

I read here that the Vcc_ in pin is needed for the prommer to follow the target voltage. I know my target voltage.

My idea was to do the in-field programming with some kind of adaptor.

  • both sides are powered independently

  • I take power out of Vcc_out

  • reduce it to my target voltage

  • I feed back into Vcc_in ?

If there is a better solution - maybe different stand alone programmers or programmers that work with the bootstrap loader - any hints welcome !

sincerely

Jens

2

The BSL will work with 6 pins - gnd, vcc, tx, rx, and the two pins for reset and test.

Since I use only the BSL, I’m unable to compare it to the TI programmer.