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DMeck's avatar
DMeck
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7 years ago

MAX10, pof-file programming fails

Hi all, I'm trying to program .pof file in MAX10 (10M04SAU324I7G) of our custom board but it fails. Programming the .sof file succeeds. nConfig, nSTATUS and CONF_DONE are pulled high with 10k. C...
DMeck's avatar
DMeck
Icon for New Contributor rankNew Contributor
7 years ago

I now found the solution for this problem. There are some level shifter connected to the FPGA. The output of these level shifters is 3,3V and during configuration all I/O pins of the FPGA are connected to GND. All in all the needed current consumption during configuration was to high (> 1A) and got limited by the power supply. So in the end the configuration failed.

I am now confused about the low state of the I/O pins during configuration. According to the "MAX10 configuration guide" these pins should be tri-state during configuration (see https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/max-10/ug_m10_config.pdf, page 28, figure 10).

Is it possible to configure the state of the I/O pins during configuration?

Regards

Dennis

AnandRaj_S_Intel's avatar
AnandRaj_S_Intel
Icon for Regular Contributor rankRegular Contributor
7 years ago

​Hi,

The low state of the I/O pins during configuration is because of

  1. All I/Os pins are tri-stated with no pull up.
  2. Initialization Configuration Bits (ICB) stores the configuration feature settings of the Intel MAX 10 device. You can set the ICB settings in the Convert Programming File tool. Set I/O to weak pull-up prior usermode

• Enable: Sets I/O to weak pull-up during device configuration.

• Disable: Tri-states I/O by default it is enabled.

Regards

Anand