Datasheet
Table Of Contents
- Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
- 1.0 Introduction
- 2.0 Pin Description and Configuration
- 3.0 Functional Description
- 3.1 Transceiver
- 3.2 Auto-negotiation
- 3.3 HP Auto-MDIX Support
- 3.4 MAC Interface
- 3.5 Serial Management Interface (SMI)
- 3.6 Interrupt Management
- 3.7 Configuration Straps
- 3.8 Miscellaneous Functions
- 3.9 Application Diagrams
- 4.0 Register Descriptions
- 4.1 Register Nomenclature
- 4.2 Control and Status Registers
- TABLE 4-2: SMI Register Map
- 4.2.1 Basic Control Register
- 4.2.2 Basic Status Register
- 4.2.3 PHY Identifier 1 Register
- 4.2.4 PHY Identifier 2 Register
- 4.2.5 Auto Negotiation Advertisement Register
- 4.2.6 Auto Negotiation Link Partner Ability Register
- 4.2.7 Auto Negotiation Expansion Register
- 4.2.8 Mode Control/Status Register
- 4.2.9 Special Modes Register
- 4.2.10 Symbol Error Counter Register
- 4.2.11 Special Control/Status Indications Register
- 4.2.12 Interrupt Source Flag Register
- 4.2.13 Interrupt Mask Register
- 4.2.14 PHY Special Control/Status Register
- 5.0 Operational Characteristics
- 6.0 Package Information
- 7.0 Application Notes
- Appendix A: Data Sheet Revision History
- The Microchip Web Site
- Customer Change Notification Service
- Customer Support
- Product Identification System
- Worldwide Sales and Service
LAN8720A/LAN8720AI
DS00002165B-page 46 2016 Microchip Technology Inc.
Note 4-3 The default value of this bit is determined by the MODE[2:0] configuration straps. Refer to
Section 3.7.2, MODE[2:0]: Mode Configuration for additional information.
4.2.6 AUTO NEGOTIATION LINK PARTNER ABILITY REGISTER
Index (In Decimal): 5 Size: 16 bits
Bits Description Type Default
15 Next Page
0 = no next page ability
1 = next page capable
Note: This device
does not support next page ability.
RO 0b
14 Acknowledge
0 = link code word not yet received
1 = link code word received from partner
RO 0b
13 Remote Fault
0 = no remote fault
1 = remote fault detected
RO 0b
12:11 RESERVED RO —
10 Pause Operation
0 = No PAUSE supported by partner station
1 = PAUSE supported by partner station
RO 0b
9 100BASE-T4
0 = no T4 ability
1 = T4 able
Note: This device
does not support T4 ability.
RO 0b
8 100BASE-TX Full Duplex
0 = no TX full duplex ability
1 = TX with full duplex
RO 0b
7 100BASE-TX
0 = no TX ability
1 = TX able
RO 0b
6 10BASE-T Full Duplex
0 = no 10Mbps with full duplex ability
1 = 10Mbps with full duplex
RO 0b
5 10BASE-T
0 = no 10Mbps ability
1 = 10Mbps able
RO 0b
4:0 Selector Field
00001 = IEEE 802.3
RO 00001b
4:0 Selector Field
00001 = IEEE 802.3
R/W 00001b
Bits Description Type Default