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Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
Revision 1.0 (05-28-09) 40 SMSC LAN8720/LAN8720i
DATASHEET
The following registers are supported (register numbers are in decimal):
5.1 SMI 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.
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