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elhep / AFCZ

AMC FMC Carrier board based on ZYNQ Ultra Scale + SoC
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PS doesn't have access to INTn signal of ETH switch #115

Open marmeladapk opened 3 years ago

marmeladapk commented 3 years ago

But it has access to MDIO through IC59.

The CPU’s SMI interface is used to access the device’s registers but it cannot be used until the device’s INTn pin becomes active low (indicating the Register Loader is done processing the EEPROM or that no EEPROM was present).

(although this may not be a problem since MMC attaches PS to switch, so it can do so only after INTn is low)

gkasprow commented 3 years ago

we may need INT signal to use advanced switch functions. MDIO polling may be waste of CPU resources