We already use DP83848I through RMII with SC584 and it works good. Then we create another device using SC573 with same idea. Ethernet transmit from our device work good. But we can't receive anything. There is no packets, good or bad. Signals ETH0_RXD0 (port PA13), ETH0_RXD1 (port PA12), ETH0_CRS (port PB01) are good. May be we should use another signal (not ETH0_CRS) as data valid signal?