LAN9303MI-AKZE Datasheet, PDF (181/386 Pages) SMSC Corporation – Small Form Factor Three Port 10/100 Managed Ethernet Switch with Dual MII/RMII/Turbo MII

Small Form Factor Three Port 10/100 Managed Ethernet Switch with Dual MII/RMII/Turbo MII
Datasheet
13.2.6 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 13.2, 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 19 for a
detailed description of the various device 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 96. A list of all Virtual PHY register
indexes for serial access can be seen in Table 13.5. For more information on the Virtual PHY access
modes, refer to section Section 13.3. For Virtual PHY functionality and operation information, see
Section 7.3, "Virtual PHY," on page 110.
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 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 13.5 Virtual PHY MII Serially Adressable Register Index
INDEX #
SYMBOL
REGISTER NAME
0
VPHY_BASIC_CTRL
Virtual PHY Basic Control Register, Section 13.2.6.1
1
VPHY_BASIC_STATUS
Virtual PHY Basic Status Register, Section 13.2.6.2
2
VPHY_ID_MSB
Virtual PHY Identification MSB Register, Section 13.2.6.3
3
VPHY_ID_LSB
Virtual PHY Identification LSB Register, Section 13.2.6.4
4
VPHY_AN_ADV
Virtual PHY Auto-Negotiation Advertisement Register,
Section 13.2.6.5
5
VPHY_AN_LP_BASE_ABILITY Virtual PHY Auto-Negotiation Link Partner Base Page Ability
Register, Section 13.2.6.6
6
VPHY_AN_EXP
Virtual PHY Auto-Negotiation Expansion Register,
Section 13.2.6.7
31
VPHY_SPEC_CTRL_STATUS
Virtual PHY Special Control/Status Register, Section 13.2.6.8
SMSC LAN9303M/LAN9303Mi
181
DATASHEET
Revision 1.5 (07-08-11)