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Khaled_'s avatar
Khaled_
Icon for New Contributor rankNew Contributor
11 months ago
Solved

Cyclone10 LP Custom PCB IO Pins Always HIGH issue

Hello, I've designed a custom PCB around the 10CL006YE144 FPGA part. And now I'm having a hard time getting it to work. It does respond to the JTAG and I can upload any code to it via JTAG and it do...
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  • Khaled_'s avatar
    Khaled_
    11 months ago

    I'm just writing 1's and 0's to my onboard 8 LEDs. Which are all HIGH all the time no matter what I write to them. And here is my simple demo project

    https://drive.google.com/file/d/15RSc9Cn_l2P2X5Fk2Q2P3KgyZQhG_02b/view?usp=sharing

    The unused pins are "input tri-stated" in the device configurations.

    Doing power recycle while holding the nConfig button LOW results in all FPGA pins are HIGH even before config starts. When i release the nConfig button, the config DONE LED lights ON, and all the FPGA IO pins are still HIGH same as before.

sstrell's avatar
sstrell
Icon for Super Contributor rankSuper Contributor
11 months ago

What design are you using to test this? Some code might be helpful.

What do you have the unused pins set to in the Device & Pin options?

Are you saying that every single GPIO pin is stuck high after programming?

  • Khaled_'s avatar
    Khaled_
    Icon for New Contributor rankNew Contributor
    11 months ago

    I'm just writing 1's and 0's to my onboard 8 LEDs. Which are all HIGH all the time no matter what I write to them. And here is my simple demo project

    https://drive.google.com/file/d/15RSc9Cn_l2P2X5Fk2Q2P3KgyZQhG_02b/view?usp=sharing

    The unused pins are "input tri-stated" in the device configurations.

    Doing power recycle while holding the nConfig button LOW results in all FPGA pins are HIGH even before config starts. When i release the nConfig button, the config DONE LED lights ON, and all the FPGA IO pins are still HIGH same as before.