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CC3100: Failed to WiFi connection

Bright Zhu
Intellectual 260 points
Part Number: CC3100

Dears

I have a few questions to ask, thank you very much

1. CC3100 serial port communication is normal, but wireless connection is unavailable. Measure DCDC_ ANA、DCDC_ PA、DCDC_ The DIG voltage is normal. How can I troubleshoot it? Is there a register that can be set?

2. PIN41 DCDC of CC3100_ PA has no voltage, does it indicate that CC3100 has been damaged?

TX;18dBm

RX:-95.7dBm

Flahs PN: MD25D16C

Operating Steps Internal power output Whether to output chip selection signal to flash Software serial port printing
result
Fault board 1
Power supply: VDD_ ANA output 1.9V, DCDC_ PA_ SW power output 0.2V, VDD_ DIG power output 1.2V		 Oscilloscope fails to measure CS waveform of FLASH Failed to print WiFi connection of SCM software serial port 　
Change the FLASH of the faulty board 1 to the normal board Power supply: VDD_ ANA output 1.9V, DCDC_ PA_ SW power output 0.4V, VDD_ DIG power output 0.9V Oscilloscope can measure CS waveform of FLASH Failed to print WiFi connection of SCM software serial port It indicates that the flash of fault board 1 is faulty
Change CC3100 of fault board 1 to normal board Power supply: VDD_ ANA output 1.9V, DCDC_ PA_ SW power output 0.4V, VDD_ DIG power output 0.9V Oscilloscope fails to measure CS waveform of FLASH Failed to print WiFi connection of SCM software serial port

It indicates that the CC3100 of fault board 1 is faulty
Change the CC3100 and Flash of the normal board to the faulty board 1 Power supply: VDD_ ANA output 1.9V, DCDC_ PA_ SW power output 0.2V, VDD_ DIG power output 1.2V Oscilloscope can measure CS waveform of FLASH Can connect to WiFi and print signal strength It indicates that other components of fault board 1 are normal

WIFI connection failure prompt:

  • 0
    TI__Mastermind 45065 points

    Hey Bright,

    I will take a look at this with one of my software experts and get back to you early next week.

    Just some preliminary questions:

    When you say normal board, does that mean you have boards that work and some that don't?

    What do you mean by PA_ SW power output? Are you referring to Pin 42? 

    For VDD_ DIG power output, you are referring to pins 9 & 56?

    Could we get the scope captures showing working and non working communication?

  • 0 in reply to Dylan Hubbard
    Intellectual 260 points

    Thanks 

    When you say normal board, does that mean you have boards that work and some that don't?

    //Yes, Normal =Functional circuit board

    What do you mean by PA_ SW power output? Are you referring to Pin 42? 

    //L6 Between P40 and P41

    For VDD_ DIG power output, you are referring to pins 9 & 56?

    //L7 P43

    Could we get the scope captures showing working and non working communication?

    //

    What does this sentence mean? Does the chip connect to WiFi or can the chip normally read the data in flash?

    Is there any debugging method?

  • 0 in reply to Bright Zhu
    TI__Mastermind 45065 points

    Hey Bright,

    When there are working boards and a board that has issue. Then the debugging steps similar to yours can be followed to see what device is introducing the problem. If you are not seeing any power output on the DCDC SW pins, then its likely the CC3100 can be damaged. I would take the faulty board and replace the CC3100 device with a new sample or from one of the normal boards. If the new device also shows similar issues, we can look into other avenues for debugging.

  • 0 in reply to Dylan Hubbard
    Intellectual 260 points

    Hi  Dylan Hubbard

    P2P testing has been done, and the problem follows the chip

  • 0 in reply to Bright Zhu
    TI__Mastermind 45065 points

    Hey Bright,

    Was the device ever working or was not working from the start? This could potentially be a result of ESD from assembly.