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Hello,
I would please like to ask about AN706:
It states:
"HPS I2C0 is routed through the FPGA interface and acts as a master to various on-board I2C slaves: ...... A bi-directional buffer, ALT_IOBUF, must be added in the design to connect the I2C signals to an external open drain IO. The buffer can be included by instantiating ALT_IOBUF in ghrd_top.v"
I don't understand, what does it mean that " I2C0 is routed through the FPGA" ?
And what is the purpose of ALT_IOBUF ?
Thank you!
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Hi,
Based on my understanding, it means that this will act the I2C0 as a master to the on-board I2C slaves.
You may find the "ALT_IOBUF" user guide here for more explanation of the IP:
https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/ug/ug_altiobuf.pdf
Regards.
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