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CDCE6214-Q1EVM: Is it possible to power up with USB but control with external I2C microcontroller?

Alvaro GM
Prodigy 120 points
Part Number: CDCE6214-Q1EVM
Other Parts Discussed in Thread: USB2ANY

Hi!

User guide for CDCE6214-Q1EVM explains how to set up the board for external 5V power, but it requires modifying the board and I don't really see the need. What I would like to do is use the USB connection to power up the board but connect an external FPGA i2c ports to the device's. Is this possible somehow?

Also, regarding this, the user guide is a bit confusing, as it says:

Short pins 2 and 3 of J6 and pins 2 and 3 of J10. The purpose is to disconnect the SDA and SCL pins

Connect SDA (pin 2 of J6), SCL (pin 2 of J10), and GND to USB2ANY.

But of course I cannot do that because there is a jumper on pin 2 of J6 (which, by the way, are not numerated, so there's no way to know which is which)

Thanks!

  • 0
    TI__Genius 12380 points

    Alvaro,

    You can connect the I2C pins of your FPGA to GPIO2 (SDA) and GPIO3 (SCL) of the EVM - center pin of the jumpers below.

    If you are not driving the USB2ANY, the I2C lines will be pulled high by the on-board pullup resistors, and the FPGA can communicate freely with the device.

    Thanks,

    Kadeem