Camera board • Re: Supporting RPI cameras on my custom FPGA board

My I2C controller already operates at 1.8v do you think I should add a voltage translator between the FPGA and the connector on my board that translates 1.8v <-> 3.3v because the camera expects 3.3v or do I just directly connect the I2C lanes to the FPGA I2C controller?

Camera schematics are on https://datasheets.raspberrypi.com/
V2, V3, and HQ all have voltage translators on the camera board as the camera wants 1.8V. I believe the same is true for the GS camera as well, but can't see the schematic at the moment.

Up to you to analyse what voltages your FPGA will put out, and whether that will work.
I2C is an open drain on the controller, and relies on the pull-ups for the high logic signal. What voltages is your FPGA tolerant of?

The Pi has I2C pull ups, so if you'll need to replicate that.

Sorry, I didn't understand. If I'll what? I think you meant to say that I need to add the +3.3v pull up resistors on my board.

An extra "if" crept in.
"The Pi has I2C pull ups, so you'll need to replicate that."

Statistics: Posted by 6by9 — Thu Mar 27, 2025 10:17 am

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