The DP83867IRPAP PHY U33 reset circuit is shown in the following figure. The DP83867IRPAP can be reset by the GEN3_EXP_RESET_B signal through the I2C0 TCA6416A U15 bus expander P06 pin 10 or the PS_POR_B signal generated by the MAX16025 U6 POR device pin 11.
SW4 pushbutton at the MAX16025 U5 pin 6 input also triggers a PS_POR_B signal.
Figure 1. Ethernet PHY Reset Circuit
