SPRUJ17I March 2022 – August 2025 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1
The receive data from the MII interface is stored in the receive data FIFO which is 32 bytes. The PRU can access this data through the register R31. Depending on the configuration settings, the data can be latched on reception of one or two bytes. In each scheme, the configured number of nibbles is assembled before being copied into the PRU registers. Figure 7-71 shows the inputs and outputs of the data latch logic block.
The receiver logic in MII_RT can be programmed through the MII_RT MII_RT_RXCFG0 and MII_RT MII_RT_RXCFG1 registers to remove or retain the preamble + SFD from incoming frames.
Figure 7-71 RX Data Latch