Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

No output from HPS UART during boot

I have a custom board with a Cyclone V SoC. The chip powers up ok and I can see the FPGA and the HPS on the JTAG chain when I use my USB blaster. So far so good! I would now like to get the HPS...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

Hi, in my case, there was a problem with the Altium footprint for the FTDI usb usart chip. The problem was on the solder-mask layer. This was shorting out some pins on that chip during reflow soldering.

Other things to check is that you have the usart in and out pins the correct way round.