Figure 4-12. Pru0 Icss Gigabit Ethernet Phy Strapping; Table 4-5. Gigabit Ethernet Phy Mdio/Mdc Mux - Texas Instruments AM263 Series User Manual

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For the Gigabit Ethernet PHY:
• The Ethernet PHY requires three separate power sources. VDDIO is the 3.3 V, system generated analog
supply. There are dedicated LDO's for the 1.1V and 2.5V supplies for the Ethernet PHY.
• The Ethernet PHY uses many functional pins as strap options to place the device into a specific mode of
operation. Each functional pin has a default mode that is driven by an internal pull resistor.
• There is a 2:1 mux (TMUX154EDGSR) that controls the mapping of MDIO and MDC signals for the ethernet
PHY's.
SEL Condition
HIGH AM263x SoC MDIO0 MDIO/MDC signals selected
LOW PRU MDIO/MDC signals selected
• The Ethernet PHY uses many functional pins as strap options to place the device into a specific mode of
operation. Each functional pin has a default mode that is driven by an internal pull resistor.
Figure 4-12. PRU0 ICSS Gigabit Ethernet PHY Strapping Resistors
SPRUJ09C – MARCH 2022 – REVISED FEBRUARY 2023
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Table 4-5. Gigabit Ethernet PHY MDIO/MDC MUX

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Hardware Description
Function
A1/B1→A/B port
A0/B0→ A/B port
AM263x Control Card Hardware User's Guide 25