LAN9313 datasheet(209/398 Pages) SMSC

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Three Port 10/100 Managed Ethernet Switch with MII

Datasheet

SMSC LAN9313/LAN9313i

209

Revision 1.2 (04-08-08)

DATASHEET

13.1.7

Virtual PHY

This section details the Virtual PHY System CSR’s. These registers provide status and control

information similar to that of a real PHY while maintaining IEEE 802.3 compatibility. The Virtual PHY

registers are addressable via the memory map, as described in Table 13.1, as well as serially via the

MII management protocol (IEEE 802.3 clause 22). When accessed serially, these registers are

accessed through the MII management pins (in PHY modes only) via the MII serial management

protocol specified in IEEE 802.3 clause 22. See Section 2.3, "Modes of Operation," on page 23 for a

detailed description of the various LAN9313/LAN9313i modes. When being accessed serially, the

Virtual PHY will respond when the PHY address equals the address assigned by the

phy_addr_sel_strap configuration strap, as defined in Section 7.1.1, "PHY Addressing," on page 84. A

list of all Virtual PHY register indexes for serial access can be seen in Table 13.4. For more information

on the Virtual PHY access modes, refer to section Section 13.2. For Virtual PHY functionality and

operation information, see Section 7.3, "Virtual PHY," on page 98.

Note:

All Virtual PHY registers follow the IEEE 802.3 (clause 22.2.4) specified MII management

specified register index (in decimal) is included under the LAN9313/LAN9313i memory mapped

offset of each Virtual PHY register as a reference. For additional information, refer to the IEEE

802.3 Specification.

Note:

When serially accessed, the Virtual PHY registers are only 16-bits wide, as is standard for MII

management of PHY’s.

Table 13.4 Virtual PHY MII Serially Adressable Register Index

INDEX #

SYMBOL

VPHY_BASIC_CTRL

Virtual PHY Basic Control Register, Section 13.1.7.1

VPHY_BASIC_STATUS

Virtual PHY Basic Status Register, Section 13.1.7.2

VPHY_ID_MSB

Virtual PHY Identification MSB Register, Section 13.1.7.3

VPHY_ID_LSB

Virtual PHY Identification LSB Register, Section 13.1.7.4

VPHY_AN_ADV

Virtual PHY Auto-Negotiation Advertisement Register,

Section 13.1.7.5

VPHY_AN_LP_BASE_ABILITY

Virtual PHY Auto-Negotiation Link Partner Base Page Ability

VPHY_AN_EXP

Virtual PHY Auto-Negotiation Expansion Register,

Section 13.1.7.7

VPHY_SPEC_CTRL_STATUS

Virtual PHY Special Control/Status Register, Section 13.1.7.8

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