Forum Discussion
New ContributorFPGA issue on electronic board
Background: HVIO stuck at high after configuration
Root Cause: RCOMP_GTS pin are left floating
Resolution: connect RCOMP_GTS to ground via external resistor (refer KDB)
Corrective Action: KDB filed
Regular ContributorHello,
I need more details on your setup in order to help you.
1- Are you using I2C on HPS?
2- What are you trying to achieve?
regards,
Farabi
New ContributorHi Farabi,
It's OK for sharing you more details
No, I am using I2C without HPS
Trying to implement I2C accesses to configure a clock component on the electronic board.
The test has been performed on two different banks (6B and 6D).
Both banks are HVIO banks are powered with 1V8.
Find attached the screenshot which highlight the issue
SignalTap on bank 6B which works correctly
SignalTap on bank 6D which does not work
Regards,
Fabrice
- Farabi_Altera
Hello,
Are you able to pullup the I2C signals and see if this can fix the issue?
There are internal weak pullup for the IOs but it might be not enough for longer trace I2C signals.
regards,
Farabi- FabriceNs
Hi Farabi,
Thank you for your help.
For information the solution has been found for the issue.
You can find more detail on the link below
Regards,
Fabrice
- Farabi_Altera
Hello Fabrice, thanks for the info.
There is latest KDB related to this issue : Why do HVIO pins in an Agilex® 5 or Agilex® 3 FPGA HVIO bank appear to be non-functional after device configuration? | Altera Community - 353565
Hope this helps.
regards,
Farabi
