SMSC LAN8720i User Manual
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