CCS/MSP430FR5872: Error initializing emulator: The voltage 1469 value is not correct/allowed for the USB FET

Tim Williams13

Part Number: MSP430FR5872
Other Parts Discussed in Thread: MSP-FET, , MSP-TS430PM64F

Tool/software: Code Composer Studio

I have what I believe to be an identical setup that I have successfully used in weeks past, but today, I am seeing this error message. Checking the VCC_Target pin from the target board to pin 4 of the MSP-FET connector, I see 3.6V (which is the correct VCC on my target board) if the MSP-FET is not connected, but when I connect the MSP-FET, I see 4.6V on this pin. From the HW manual for the debugger, this pin is supposed to be a VSense input pin. How could it be driving the voltage higher? I do not have a connection between the MSP-FET pin 2 (VCC_Tool) and my target board.

My project debug properties>MSP430 Options>Target Voltage (mV) is set to 3600

I have not found any other property setting that might be applicable to this issue.

I tried a second MSP-FET with the same results.

I tried multiple target boards with same results (varying reading values).

Suggestions?

over 6 years ago

0 Walter Schnoor over 6 years ago

TI__Expert 7530 points

Hi Tim,

I'll look into this. I assume that you are using the MSP-TS430PM64F target board with the MSP430FR5872 in the LQFP (PM64) package?

Regards,
Walter

0 Tim Williams13 over 6 years ago in reply to Walter Schnoor

Prodigy 110 points

The target boards are our own custom board that we have been using for months. The processor is the MSP4305972. No changes to the boards since we last used the debugger on it.

I do have MSP-TS430PM64F board that I have not used in a long time.

0 Walter Schnoor over 6 years ago in reply to Tim Williams13

TI__Expert 7530 points

Tim,

Looking at the MSP-FET schematic in slau647 (www.ti.com/.../slau647k.pdf), the VCCSenseTarget input in pin 4 has a 100pF to GND, followed by a 300k resistor ladder to ground. The split between two 150k resistors goes to an ADC input. Do you have the MSP-FET GND pin correctly terminated as well?

Walter

0 Tim Williams13 over 6 years ago in reply to Walter Schnoor

Prodigy 110 points

Another engineer saw immediately that I had power connected incorrectly, and the custom board battery protection circuit had cut off power on the target board. Fixed the connection, and the problem is resolved.
As I suspected - user error.

Thanks for investigating.

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CCS/MSP430FR5872: Error initializing emulator: The voltage 1469 value is not correct/allowed for the USB FET