LAN9313 Datasheet, PDF (132/398 Pages) SMSC Corporation – Three Port 10/100 Managed Ethernet Switch with MII

9.4.5
Three Port 10/100 Managed Ethernet Switch with MII
Datasheet
PHY Mode SMI Managed
In PHY mode SMI managed, the internal PHYs, Virtual PHY, and SMI slave block are accessed via
the MII management pins. The PMI is not used in this mode.
The Virtual PHY interface is accessible via the SMI slave or the EEPROM Loader. Refer to Section
9.2, "SMI Slave Controller," on page 125 and Section 8.2.4, "EEPROM Loader," on page 113 for
additional information.
Figure 9.2 details the MII multiplexer management path connections for this mode.
MDI SMI Slave
MDO
MDCLK
MDIO_ DIR
Parallel
Master
MDI Virtual PHY
MDO
MDCLK
MDIO_ DIR
Parallel
Slave
MDI PHY2
MDO
MDIO_ DIR
MDCLK
MDI PHY1
MDO
MDIO_ DIR
MDCLK
Management
Mode Selection
MII Pins
MDIO_ DIR
MDO
MDI
MDC_ DIR
MDC_ OUT
MDC_IN
MDIO
MDC
Management
Mode Selection
MDO MDCLK MDI MDO_EnN
PMI
Parallel Slave
Figure 9.5 MII Mux Management Path Connections - PHY Mode SMI Managed
Revision 1.2 (04-08-08)
132
DATASHEET
SMSC LAN9313/LAN9313i