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Allwinner H5 network driver -- the Realtek 8211E chip

A 72 page datasheet (RTL8211E(G)-xx-CG_DataSheet_1.3.pdf) is available.

Other PHY chips

The 8211E chip is very commonly used, but I will have to deal with some others.

Of course, we have the internal Allwinner PHY (used by my H3 boards.)

There is a 10/100 capable PHY (the IP101G) on my EBAZ4205 Zynq boards.

My Antminer S9 Zynq boards have a PHY labeled B50612E. This is a gigabit capable PHY from Broadcom. I have found a datasheet for the B50612D, but not the E.

In any case, I have only ever needed to use the standard registers so far, so having a detailed datasheet may not matter.

Pins

• 8 pins provide 4 signals as differential pairs to the transformer that drives the RJ45 connector (MDI0,1,2,3).
• 2 pins connect to a 25 Mhz crystal.
• 1 pin provides a 125 Mhz signal generated by a PLL in the chip.
• 14 pins provide the RGMII interface signals.
• 4 pins provide the management interface.
  MDC, MDIO, PME, INTB
• 1 pin to reset the chip
• 3 pins set the PHY address (wired to 001)
• 2 pins configure autonegotiation
  set to 11 to advertise all possibilities
• 1 pin configures RGMII or GMII
  configures RGMII of course
• 1 pin configures either 3.3 or 2.5 volts for RGMII
  configures 2.5 volts
• (3 pins drive LED - same as PHY address config pins)
• 6 pins deal with an internal 1.05 volt regulator
• 15 pins are power and ground
• 1 pin (pin 12) is "not connected"

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