Datasheet

LAN8740A/LAN8740Ai
DS00001987A-page 82  2013-2015 Microchip Technology Inc.
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)
Index
(In Decimal)
Register Name
3
(PCS)
0 PCS Control 1 Register
1 PCS Status 1 Register
5 PCS MMD Devices Present 1 Register
6 PCS MMD Devices Present 2 Register
20 EEE Capability Register
22 EEE Wake Error Register
32784 Wakeup Control and Status Register (WUCSR)
32785 Wakeup Filter Configuration Register A (WUF_CFGA)
32786 Wakeup Filter Configuration Register B (WUF_CFGB)
32801 Wakeup Filter Byte Mask Registers (WUF_MASK)
32802
32803
32804
32805
32806
32807
32808
32865 MAC Receive Address A Register (RX_ADDRA)
32866 MAC Receive Address B Register (RX_ADDRB)
32867 MAC Receive Address C Register (RX_ADDRC)
32868 Miscellaneous Configuration Register (MCFGR)
7
(Auto-Negotiation)
5 Auto-Negotiation MMD Devices Present 1 Register
6 Auto-Negotiation MMD Devices Present 2 Register
60 EEE Advertisement Register
61 EEE Link Partner Advertisement Register
30
(Vendor Specific)
2 Vendor Specific MMD 1 Device ID 1 Register
3 Vendor Specific MMD 1 Device ID 2 Register
5 Vendor Specific 1 MMD Devices Present 1 Register
6 Vendor Specific 1 MMD Devices Present 2 Register
8 Vendor Specific MMD 1 Status Register
11 TDR Match Threshold Register
12 TDR Short/Open Threshold Register
14 Vendor Specific MMD 1 package ID 1 Register
15 Vendor Specific MMD 1 package ID 2 Register