MSP430FR5989 does not start after power down.

Trashaccount1912

Other Parts Discussed in Thread: MSP430FR5989, MSP-FET

Hi everyone,

I'm using a MSP430FR5989 in combination with a MSP-FET tool and CCS 6. I experience the following:

I can program and start the MSP via CCS and JTAG. I can disconnect the JTAG cable, push the reset button, and the program restarts. When I disconnect and then reconnect the power source, the MSP will not start, pushing the reset button won't help. In this state I can start the program by plugging in the JTAG cable for a brief moment and then unplugging it again. This works even with CCS closed, so I'm sure the memory doesn't get lost without power. Starting the MSP this way only works once, then the FET has to be disconnected from USB and reconnected, to be able to start the MSP again.

Now I'm wondering: what causes this kind of behaviour, and how can I get the chip to run once the power gets turned on? Any help would be much appreciated.

Best Regards,

Andreas Vetter

over 9 years ago

0 Trashaccount1912 over 9 years ago

Prodigy 150 points

Even a hint in which direction to look for the problem (or the name of the feature, if it is one) would help me much. I already went through any documents I could imagine to be related to this.

Thanks,
Andreas

0 zrno soli over 9 years ago in reply to Trashaccount1912

Guru 33653 points

And what about power source? FR5989 can't work on 1.8V even in datasheet working range is 1.8V - 3.6V. How you know that is not working as standalone? Pins are turned on (bic.w #LOCKLPM5, &PM5CTL0) at program begin?

0 Trashaccount1912 over 9 years ago in reply to zrno soli

Prodigy 150 points

This solves it. Thank you very much.

With 1.9V it works. So 1.8V apparently is not enough to start the MSP, but enough to keep it running, once turned on.

**Attention** This is a public forum

MSP low-power microcontrollers

MSP low-power microcontroller forum

MSP430FR5989 does not start after power down.