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Original question:

CC2640R2F: Disable VDDS_LOSS_EN_OVR (protected/locked)

CC2640R2F: SW stuck after high voltage pulse on my circuit using simple peripheral project

Erez Shaul9
Intellectual 290 points
Part Number: CC2640R2F

Dear E2E,

I am attending to your knowledge in continue to former subject.

I have my own circuit, running simple peripheral project,

As part of the circuit working modes, it generates a high voltage pulse on the circuit, when this occurs my CPU is influenced.

1. CPU reset - different thread of E2E

2. CPU SW Halt

I am referring to this forum to try and understand how can i debug this halt.

I know it's related to the high voltage pulse, but i don't know how it's related.

VDDs and GND lines looks OK during the pulse, and i suspect that the CPU shock is coming from the other peripheral pins.

I'll appreciate any assistance/guideness,

BR,

Erez Shaul

  • 0
    TI__Genius 11810 points
    Hi Erez,

    Can you share your schematics with us? At least the interface between CC2640R2F and the high voltage circuit. When you say high voltage, what voltage range do you refer to?

    Thanks and regards,
    Simon
  • 0 in reply to Simon J
    Intellectual 290 points

    Dear Simon,

    Unfortunately i cannot share my design just jet,

    Basically, the "High Voltage" part is divided to 2:

    1. Charging 450V capacitor (not interfering the MCU)

    2. Flash light using the charged capacitor and suitable light component (this is the part causing the MCU to fail)

    During the flash, there is a high current flowing through the light component, for a short amount of time, causing the MCU to fail as a result.

    MCU fail means reset or Halt (both are happening)

    BR,

    Erez Shaul

  • 0 in reply to Erez Shaul9
    TI__Genius 11810 points
    Hi Erez,

    How is CC2640R2F connected to the high voltage part of your circuit? Do you have any protection in between, i.e. current limiters, voltage suppressors?

    How is CC2640R2F supplied? Is it sharing power rail with some of the high voltage components? Have you checked that you don't have any dips on VDDS when trigger the flash?

    Thanks,
    Simon