• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Subscribers 40 subscribers
  • Views 372 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

CC3120: Custom board with CC3120 in pre-regulated mode CC31xxEMUBOOST, Uniflash not connecting

Meenal B
Intellectual 615 points
Part Number: CC3120
Other Parts Discussed in Thread: CC31XXEMUBOOST, UNIFLASH,

Hi

I have a custom board with a CC3120 device in pre-regulated mode, which I am trying to bring up. All the power rails are OK.

I connected the CC3120 to a CC31xxEMUBOOST according to the CC3120 production line guide and connected that to the PC via J6 on the EMUBOOST.

When I click "Connect" on Uniflash, it doesn't seem to work - the operation times out. 

Actually, regardless of if my custom board with the CC3120 is hooked up, the "Connect" operation on Uniflash times out, although I can see the EMUBOOST board in Device Manager.

I have connected the RX, TX, nRESET, and GND on the CC3120 to the EMUBOOST. the nHib line is pulled low. Could this be the issue?

Thanks,

Meenal

  • 0
    TI__Mastermind 40965 points
    Hi Meenal,

    You shouldn't have nHib pulled low, as that will put the CC3120 into hibernate. Try removing your pulldown on that line and seeing if that allows you to connect and program with Uniflash.

    Regards,
    Michael
  • 0 in reply to Michael Reymond
    Intellectual 615 points

    Hi Michael

    We've pulled the nHIB line high now, but still seeing a "Operation failed: Timeout reading data". 

    I put a logic analyser on the EMUBOOST RX,TX, and nHIB lines (which connect to the TX, RX, and nRESET of the CC3120) and found the following (no response from CC3120)

    Originally we had left the VCC on the EMUBOOST board at 3.3V (the I/O is running at 2.5V) - could this have damaged the chip? Now we've connected the correct voltage to pin 1 of J4 on the EMUBOOST.

    Any comments are appreciated,

    Thanks,

    Meenal

  • 0 in reply to Meenal B
    Intellectual 615 points
    Hi,

    Just an update on that last post, we tried with a new board and the correct EMU board supply voltage. We are still seeing this issue where nothing is returned on the UART line from the CC3120.

    We modified a CC3120BOOST to create the same circuit and did not see this problem with it.

    Any troubleshooting tips are much appreciated!

    Thanks,
    Meenal
  • 0 in reply to Meenal B
    Intellectual 615 points
    Apologies - we've just discovered that there was an issue with how the external crystal was hooked up!