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MSP430FR2476: The current drops to zero for 10 seconds during energy trace.

Expert 2540 points
Part Number: MSP430FR2476
Other Parts Discussed in Thread: MSP-FET

Tool/software:

Hi All,

I want to measure power consumption using Energy Trace on a board using MSP430FR2476, but the current is 0 for 10 seconds, so measurement is not possible.
Please tell me the cause.
Since the measurement was taken without entering LPM, it is unlikely that the power consumption is low.

Usage environment
OS:
Edition Windows 11 Pro
Version 24H2
OS Build 26100.4061
Experience Windows Feature Experience Pack 1000.26100.84.0

IDE:
Code Composer Studio 20.1.1.8__1.7.1
Default VS Code API: 1.92.2

MSP-FET connection

FET side CPU side
TDO/TDI 2 (RST/NMI/SBWTDIO)
TCK 3 (TEST/SBWTCK)
GND GND

Refer to the following URL and execute ‘Run’->‘Free Run’.
https://downloads.ti.com/ccs/esd/documents/users_guide_ccs_20.1.1/ccs_debug-trace.html 

・Testing was performed with the device connected to the actual hardware.

Additionally, when retesting with the device connected to the actual hardware without rebuilding,
the value was not zero but a low value of 200 [nA].

According to ‘8.5 Active Mode Supply Current Per MHz’ in ‘msp430fr2476.pdf,’ the active mode supply current is 135μA/MHz, so a value in the nA range at 16MHz seems unusual.

Best Regards,

Ito

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