SNLS638A December 2018 – August 2019 DP83825I
IEEE Power Down shuts down all PHY circuitry except the SMI and internal clock circuitry.
IEEE Power Down can be activated by either register access or through the INTR/PWRDN pin when the pin is configured for power-down function.
To enable IEEE Power Down through the INTR/PWRDN pin, the pin must be driven LOW to ground.
To enable IEEE Power Down through the SMI, set bit = 1 in the Basic Mode Control Register (BMCR, address 0x0000).