SPRUJ17I March 2022 – August 2025 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1
The data received and transmitted over MII conforms with the frame structure shown in Table 7-82.
| 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 7-68 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 7-68 Data Nibble Structure