LAN9313 Datasheet, PDF (130/398 Pages) SMSC Corporation – Three Port 10/100 Managed Ethernet Switch with MII

9.4.3
Three Port 10/100 Managed Ethernet Switch with MII
Datasheet
MAC Mode I²C/SPI Managed
In MAC mode I²C or SPI managed, the internal PHYs and the external PHY are accessed via the PMI.
The SMI slave and the Virtual PHY are not used in these modes.
The Virtual PHY and PMI interfaces are accessible via the I²C/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.
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 9.3 MII Mux Management Path Connections - MAC Mode I²C/SPI Managed
Revision 1.2 (04-08-08)
130
DATASHEET
SMSC LAN9313/LAN9313i