2.5 Configuring LED_1 for Tx and Rx Activity for EtherCAT Slave (DP83826 Basic Mode)
The DP83826 and KSZ8081MNX/RNB can use LED_1 to indicate Tx and Rx activity from a host ASIC or FPGA. Extended register configurations are required for DP83826.
Program register 0x0460 either with 0x1000 for
the LED to stay high OR with 0x0008 for a blinking LED