3 Replies Latest reply on Mar 9, 2017 3:03 PM by Intel Corporation

    Customized Edison PCB design Issues

    Kingman
        • 1. Re: Customized Edison PCB design Issues
          Intel Corporation
          This message was posted on behalf of Intel Corporation

          Hi Kingman,

          Thank you for using the Intel® Edison platform.
          Let us take a closer look at the schematic, however, we have to let you know that this is out of our support scope, so keep in mind that our suggestions may or may not work on your custom design. In the meantime, I would suggest you to check the Power section of the standard Breakout board schematic http://www.intel.com/content/dam/support/us/en/documents/edison/sb/mini_edison_breakout_hvm_8_26.pdf, and compare to know if there’s something you’re not doing besides USB_VBUS pin 20 not being connected to micro-usb VBUS.

          Regards, 
          Pablo M.

          • 2. Re: Customized Edison PCB design Issues
            Kingman

            Of course, meanwhile I will try to solder a wire to connect USB_VBUS and micro-usb port to see if it works.

            • 3. Re: Customized Edison PCB design Issues
              Intel Corporation
              This message was posted on behalf of Intel Corporation

              Hi Kingman,

              We’ve noticed the following from your design, hopefully this information will be useful:

              • VSYS and DCIN: In the Mini-Breakout Board schematic, these signals are directly connected between each other (not using anything like the BSS138) and they are connected to a power voltage between 3.15V and 4.4V. It's better to have a value close to 4.4V. The customer from this thread used 4.5V for example: https://communities.intel.com/message/414569#414569. It seems customer based his design on the SparkFun's schematic.
              • The UART interface runs at 1.8V, so make sure this is indeed the voltage level used.
              • According to the discussion in this thread, VBUS should be connected to 5V so the Edison can work as the USB device. This might be the reason why the Edison is not being detected: https://communities.intel.com/message/414569#414569. However, if the Edison is not powered correctly, then the issue might be in the power circuit.
              Still, we insist on following the Mini Breakout board schematic and try designing your custom board with similar connections. If you want to follow the guidelines from Sparkfun’s Base block, you can also contact their support, they might be able to help you as well.

              Regards,
              Pablo M.