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CCS/MSP-FET: How to adjust supply voltage.

Part Number: MSP-FET
Other Parts Discussed in Thread: MSP-TS430PM64F, , MSP430FR5972

Tool/software: Code Composer Studio

From the HW tools user manual (slau278y) I see the following listed as a feature of the MSP-430:

- Software configurable supply voltage between 1.8V and 3.6 V at 100 mA

How do I configure this supply? I am currently reading 1.4V on the VCC on my target board (MSP-TS430PM64F), which is fine for the processor, but I want to power additional circuitry that requires 3.3 V.

I am using CCS  Version: 7.0.0.00043 on Windows 7 Enterprise (Service Pack 1)

Regards,

  • 1.4 V VCC for MSP430 devices is not acceptable since they require 1.8 to 3.6 V for operation. Which MSP430 derivative are you using and are you sure that you are measuring the DVCC/AVCC lines instead of VCORE or DVIO?

    The MSP-FET provides 3.3V from JTAG pin 2 by default, it can be changed during a CCS debugger session by altering the Target Voltage settings under Tools → Debugger Options → MSP43x Debugger Options (MSP430). It can also be changed during an editting session through Project → Properties → Debug → MSP430 Properties → Target Voltage.

    Further information is provided in the Debugger's Guide (SLAU647) or CCS User's Guide (SLAU157).

    Regards,
    Ryan
  • I'm measuring at the VCC and GND pins on the PM64F board. The derivative on the board is the MSP430FR5972 Rev A.
    In CCS edit mode, I checked the properties, and I see it is set to 3300 mV -
    Now when I try to open a debug session, I get an error that I was not seeing earlier:

    Error initializing emulator:
    The voltage 1406 value is not correct/allowed for the USB FET

    I unplugged the USB cable and tried again, and this time the value is 1422.

    It will no longer allow me to go into the debug session.
  • AHA! - I had the power jumpered for external power on the board. Moved the jumper (J1) to the internal power position, and I'm in business with 3.3V.

    Thanks,

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