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tanabeh's avatar
tanabeh
Icon for New Contributor rankNew Contributor
2 years ago
Solved

MAX10 IO characteristics while not powered

I designed the system with MAX10 FPGA and mcu (ESP32). MAX10 is power supplied from the DC-DC 3.3V converter (named VCC3V3-SW) which is ON/OFF controlled by mcu. Mcu controls MAX10 through I2C bus p...
Fpga Devkit
EthanLi's avatar
EthanLi
Icon for Occasional Contributor rankOccasional Contributor
2 years ago

Hi Tanabeh​,


The 1V with IO pin should be a weak pull up in MAX 10.

If there is no power supply to the Max 10, there would be no volatage at all.

Could you please check if the DC-DC converter output voltage is really down to zero?

I suspect there is still output voltage from converter even in standby mode.


Thanks,

Ethan