SMSC LAN8720, LAN8720i 5.1SMI Register Format, REGISTER #, DESCRIPTION, Table 5.20 SMI Register Mapping

	Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
		Datasheet
The following registers are supported (register numbers are in decimal):
	Table 5.20 SMI Register Mapping
REGISTER #	DESCRIPTION	Group
0	Basic Control Register	Basic
1	Basic Status Register	Basic
2	PHY Identifier 1	Extended
3	PHY Identifier 2	Extended
4	Auto-Negotiation Advertisement Register	Extended
5	Auto-Negotiation Link Partner Ability Register	Extended
6	Auto-Negotiation Expansion Register	Extended
16	Silicon Revision Register	Vendor-specific
17	Mode Control/Status Register	Vendor-specific
18	Special Modes	Vendor-specific
20	Reserved	Vendor-specific
21	Reserved	Vendor-specific
22	Reserved	Vendor-specific
23	Reserved	Vendor-specific
26	Symbol Error Counter Register	Vendor-specific
27	Control / Status Indication Register	Vendor-specific
28	Special internal testability controls	Vendor-specific
29	Interrupt Source Register	Vendor-specific
30	Interrupt Mask Register	Vendor-specific
31	PHY Special Control/Status Register	Vendor-specific

5.1SMI Register Format

The mode key is as follows:

„RW = Read/write,

„SC = Self clearing,

„WO = Write only,

„RO = Read only,

„LH = Latch high, clear on read of register,

„LL = Latch low, clear on read of register,

„NASR = Not Affected by Software Reset

„X = Either a 1 or 0.

Revision 1.0 (05-28-09)	40	SMSC LAN8720/LAN8720i
	DATASHEET