Three Port 10/100 Managed Ethernet Switch with MII
Datasheet
2
9.4.6
PHY Mode I C/SPI Managed
2
In PHY mode I C or SPI managed, the Port 1/2 PHYs are accessed via the PMI, and the Virtual PHY
is accessed via the external MII management pins. The SMI slave is not used in these modes.
2
The Virtual PHY and PMI parallel interfaces are accessible via the I C/SPI slave interfaces or the
EEPROM Loader. Refer to Section 8.3, "SPI/I2C Slave Controller," on page 118 and Section 8.2.4,
"EEPROM Loader," on page 113 for additional information.
Figure 9.3 details the MII multiplexer management path connections for this mode.
MII Pins
MDIO_DIR
MDI
SMI Slave
MDO
MDO
MDIO_DIR
MDIO
MDC
Parallel
Master
MDCLK
MDI
MDC_DIR
MDC_OUT
MDC_IN
MDI
Virtual PHY
MDO
Management
Mode Selection
MDIO_DIR
Parallel
Slave
MDCLK
MDI
PHY2
MDO
MDIO_DIR
MDCLK
MDI
PHY1
MDO
MDIO_DIR
MDCLK
Management
Mode Selection
MDO MDCLK MDI MDO_EnN
PMI
Parallel Slave
2
Figure 9.6 MII Mux Management Path Connections - PHY Mode I C/SPI Managed
SMSC LAN9313/LAN9313i
133
Revision 1.2 (04-08-08)
DATASHEET
SMSC [ SMSC CORPORATION ]
