• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 33 subscribers
  • Views 497 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

DP83848C: My DP83848C hangs after some activity

Seyyed Seyyed
Prodigy 10 points
Part Number: DP83848C
Hi, I have designed an IOT board with Stm32f10x and DP83848. My board works fine and I can connect to my board and send & receive data with my micro-controller(MCU) and PC via Ethernet protocol ( PHY DP83848).However after some hours or minutes my connection drops and I can't find my board IP with ping command(Host is unreachable). I've checked my MCU and I saw that my MCU works fine after I lost my connection ( it sends and receives data via RS232 protocol and all other functions work fine). First of all I thought that my MCU could hang but after some observations I saw it works fine without any problems. I reset my MCU many times to reconnect to PHY again but my PHY could not response to ping command. I reset PHY with changing voltage of RESET_RN but it didn't work again. However , when I disconnect power from PHY and bias it again it works fine for some hours or minutes again. By the way , My power supply works fine without any problems . Here is my measurements: PFBOUT and PFBIN Voltage:1.74 RBias Voltage:1.2
  • 0
    TI__Mastermind 19780 points
    Hi Seyyed,

    Your RBIAS and PFBOUT voltages look OK.

    Have you been able to verify that removing power from the PHY always corrects the problem of no IP activity?

    Can you share a schematic of the PCB? Or at least the PHY portion?

    I'd also like a dump of the PHY's register values before and after the communication stops if possible. Please provide all registers from 0x0 to 0x1f

    Best Regards,