LAN8740A Datasheet, PDF(82/136 Page) Microchip Technology – Small Footprint MII/RMII 10/100 Energy Efficient Ethernet Transceiver with HP Auto-MDIX and flexPWR® Technology

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LAN8740A Datasheet, PDF (82/136 Pages) Microchip Technology – Small Footprint MII/RMII 10/100 Energy Efficient Ethernet Transceiver with HP Auto-MDIX and flexPWR® Technology

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LAN8740A/LAN8740Ai

4.3 MDIO Manageable Device (MMD) Registers

The device MMD registers adhere to the IEEE 802.3-2008 45.2 MDIO Interface Registers specification. The MMD reg-

isters are not memory mapped. These registers are accessed indirectly via the MMD Access Control Register and MMD

Access Address/Data Register. The supported MMD device addresses are 3 (PCS), 7 (Auto-Negotiation), and 30 (Ven-

dor Specific). Table 4-3, "MMD Registers" details the supported registers within each MMD device.

TABLE 4-3: MMD REGISTERS

MMD Device

Address

(In Decimal)

(PCS)

(Auto-Negotiation)

(Vendor Specific)

Index

(In Decimal)

32784

32785

32786

32801

32802

32803

32804

32805

32806

32807

32808

32865

32866

32867

32868

PCS Control 1 Register

PCS Status 1 Register

PCS MMD Devices Present 1 Register

PCS MMD Devices Present 2 Register

EEE Capability Register

EEE Wake Error Register

Wakeup Control and Status Register (WUCSR)

Wakeup Filter Configuration Register A (WUF_CFGA)

Wakeup Filter Configuration Register B (WUF_CFGB)

Wakeup Filter Byte Mask Registers (WUF_MASK)

MAC Receive Address A Register (RX_ADDRA)

MAC Receive Address B Register (RX_ADDRB)

MAC Receive Address C Register (RX_ADDRC)

Miscellaneous Configuration Register (MCFGR)

Auto-Negotiation MMD Devices Present 1 Register

Auto-Negotiation MMD Devices Present 2 Register

EEE Advertisement Register

EEE Link Partner Advertisement Register

Vendor Specific MMD 1 Device ID 1 Register

Vendor Specific MMD 1 Device ID 2 Register

Vendor Specific 1 MMD Devices Present 1 Register

Vendor Specific 1 MMD Devices Present 2 Register

Vendor Specific MMD 1 Status Register

TDR Match Threshold Register

TDR Short/Open Threshold Register

Vendor Specific MMD 1 package ID 1 Register

Vendor Specific MMD 1 package ID 2 Register

DS00001987A-page 82

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