SPRUJ55D September 2023 – July 2025 AM263P2 , AM263P2-Q1 , AM263P4 , AM263P4-Q1
The data received and transmitted over MII conforms with the frame structure shown in Table 7-87.
| Inter-frame | Preamble | Start of Frame Delimiter (SFD) | Data | Cyclic Redundancy Check (CRC) |
The data following the SFD is formatted in a 4-bit nibble structure. Figure 7-72 illustrates the nibble order. The MSB arriving first is on the LSB side of a nibble. When receiving data, the MII_RT receive logic will wait for the next nibble to arrive before constructing a byte and delivering to the PRU.
Figure 7-72 Data Nibble Structure