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Altera_Forum
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9 years ago

Routing of I2C0 pins on SoC

Hello everybody, I'm a new player in the FPGA field and begun my journey with the DE0 board with Cyclone V SE. I would appreciate if someone help me figure out the I2C routing inside this SoC...
Altera_Forum's avatar
Altera_Forum
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9 years ago

Hi, the pin configuration for the HPS (for example, routing the I2C to HPS I/O set 0) takes place when the HPS boots up. If you set the HPS to boot from SD card for example, the preloader located inside the SDCard will configure the I/O configuration. Even if you reprogram the FPGA (giving it a new sof) the HPS pin configuration still remains, unless you explicitly update the preloader in the SD card.