LAN9313 Datasheet, PDF (209/398 Pages) SMSC Corporation – Three Port 10/100 Managed Ethernet Switch with MII

Three Port 10/100 Managed Ethernet Switch with MII
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
register set. All functionality and bit definitions comply with these standards. The IEEE 802.3
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 #
0
1
2
3
4
5
6
31
SYMBOL
VPHY_BASIC_CTRL
VPHY_BASIC_STATUS
VPHY_ID_MSB
VPHY_ID_LSB
VPHY_AN_ADV
VPHY_AN_LP_BASE_ABILITY
VPHY_AN_EXP
VPHY_SPEC_CTRL_STATUS
REGISTER NAME
Virtual PHY Basic Control Register, Section 13.1.7.1
Virtual PHY Basic Status Register, Section 13.1.7.2
Virtual PHY Identification MSB Register, Section 13.1.7.3
Virtual PHY Identification LSB Register, Section 13.1.7.4
Virtual PHY Auto-Negotiation Advertisement Register,
Section 13.1.7.5
Virtual PHY Auto-Negotiation Link Partner Base Page Ability
Register, Section 13.1.7.6
Virtual PHY Auto-Negotiation Expansion Register,
Section 13.1.7.7
Virtual PHY Special Control/Status Register, Section 13.1.7.8
SMSC LAN9313/LAN9313i
209
DATASHEET
Revision 1.2 (04-08-08)