I/O voltage pins on Ultra96-V2 for CANBUS

Question

I saw that the header expansion uses 1.8V. I have added canbus support to the slow speed expansion header (J7).

the slave devices I am using on the buses uses 3.3 Volts , I saw on a forum that I can use a level shift but I would rather use 3.3 Volts directly from the board.

Is the way to configure the board to use 3.3 Volts for the VCC_PAUX from the schematics?

I would assume the high speed expansion header also uses 1.8 V as well? is there a set of pins from one of the banks set to use 3.3 Volts?

nico_n04 · Answer

Found the answer on the Hardware user Guide: 5.1.2

Zynq UltraScale+ MPSoC Promammable Logic (PL) provides two types of I/O banks: High-density (HD) banks and high-performance (HP) banks. HD banks support a limited number of single-ended I/O standards with speeds up to 250Mbps and VCCO voltages up to 3.30V. HP banks support a large variety of high-speed I/O standards, including differential I/O, and support VCCO voltages up to 1.80V.

nico_n04 · Answer

I like to add that HP and HD banks are on the PL side so they are can not be configured to use for the can bus from the PS. So I would need to use the logic level shifter.

I/O voltage pins on Ultra96-V2 for CANBUS

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