MSP430 Programming problem

Omkar Inamdar

Other Parts Discussed in Thread: MSP-EXP430F5529LP, MSP430G2755

Hello,

Whenver I am downloading program into MSP430G2755 micro controller powered externally using MSP430 launchpad programmer(MSP-EXP430F5529LP), I am getting "unknown device" error.

But if i power my board from launchpad itself then it programs properly and no error is shown. Why is it happening?

Reset pin is pulled up with 47k and bypassed by 1nF capacitor.

Thank you.

over 10 years ago

0 old_cow_yellow over 10 years ago

Guru 58965 points

What is the voltage of your external power supply? What is the rise time? Any glitches during that?

0 Omkar Inamdar over 10 years ago in reply to old_cow_yellow

Intellectual 870 points

External power supply is 3.3 V DC .There is no problem because of rise time as board is always powered. It porgrams normally but sometimes I get "ünknown device"error.

0 old_cow_yellow over 10 years ago in reply to Omkar Inamdar

Guru 58965 points

I do not know what is causing the problem. Connecting two devices with separate power supplies is always tricky.

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MSP430 Programming problem