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A multiplexer is provided to allow selecting either of the two MII interfaces (RX_MII0 or RX_MII1) for the receive data that is sent to PRU. Figure 6-59 shows a simple diagram of PRU receive multiplexer.
Figure 6-99 MII Receive MultiplexerThere are two receive multiplexer instances to enable selection of RX MII path for each PRU. The select lines of the RX multiplexers are driven from the PRU_ICSSG programmable registers (MII_RT_RXCFG0/1[3] RX_MUX_SELn, where n = 0 or 1).