SPRUI97E May 2017 – September 2025
The AM571x IDK EVM contains four 100Mb Ethernet ports that each connect to an industrial PHY/Transceiver (TLK105L), which then connect to RJ45 metallic connectors, with integrated magnetics, J3, J5, J6, and J8. These Ethernet transceivers are connected to the PRU1 and PRU2 subsystems within the AM5718 processor. Table 2-4 shows the mapping from the PRU-ICSS ports to the RJ45 connectors.
The COL functionality on the MII interface is not used. The TLK105L contains a feature that must be enabled via software that provides rapid link status on the COL pin. Therefore, this pin is connected to the RXLINK input to the PRU-ICSS ports for this purpose.
Test headers J4 and J7 are available to support real-time code development. The signals contained are available for simplified probing.
The reset for the transceivers is driven low coincident with the PORz reset to the AM5718 processor. The reset for each transceiver can also be driven low individually by separate general-purpose input/output (GPIO) signals from the processor. A 25MHz clock is provided into each of the TLK105L industrial transceivers.
| Connector | PRU-ICSS Port | MDIO Address | Notes |
|---|---|---|---|
| J3 | PRU1ETH0 | 0x0 on PRU1 | Not available in all configuration selections. MII pins multiplexed with VOUT1 to the LCD bridge. |
| J5 | PRU1ETH1 | 0x1 on PRU1 | Not available in all configuration selections. MII pins multiplexed with VOUT1 to the LCD bridge. |
| J6 | PRU2ETH0 | 0x0 on PRU2 | |
| J8 | PRU2ETH1 | 0x1 on PRU2 |