lan9303m Standard Microsystems Corp., lan9303m Datasheet - Page 20
lan9303m
Manufacturer Part Number
lan9303m
Description
Small Form Factor Three Port 10/100 Managed Ethernet Switch With Dual Mii/rmii/turbo Mii
Manufacturer
Standard Microsystems Corp.
Datasheet
1.LAN9303M.pdf
(380 pages)
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Revision 1.3 (08-27-09)
2.3.3
2.3.4
PHY Mode
Both Port 0 and Port 1 can be configured independently into PHY mode. PHY mode utilizes an external
MAC to provide a network path for the CPU. PHY mode supports MII and RMII interfaces. The external
MII/RMII pins must be connected to an external MAC, providing a communication path to the Switch
Fabric. MII PHY mode can operate at 10, 100, or 200Mbps (Turbo mode). RMII PHY mode can operate
at 10 or 100Mbps. In PHY mode, the device may be SMI managed or I
Section 2.3.4, "Management
When an EEPROM is connected, the EEPROM loader can be used to load the initial device
configuration from the external EEPROM via the I
can use the I
Management Modes
Various modes of management are provided in both MAC and PHY modes of operation. Two separate
interfaces may be used for management: the I
Interface Management) slave interface.
The I
external CPU. The I
The SMI/MIIM interface runs as either an SMI/MIIM slave or MIIM master. The master mode is used
to access an external PHYs registers under CPU control (assuming the CPU is using I
2
C interface runs as an I
MII
LAN9303M/
LAN9303Mi
MII
10/100
MAC
I
Ethernet
2
2
C EEPROM/
C interface to read or write the EEPROM.
MIIM/
I
SMI
2
C slave
2
C slave and I
Magnetics
I
2
C
Figure 2.3 MII/RMII PHY Mode
Modes".
Small Form Factor Three Port 10/100 Managed Ethernet Switch with Dual MII/RMII/Turbo MII
Figure 2.2 MII MAC Mode
EEPROM
(optional)
2
C slave. The slave mode is used as a register access path for an
2
DATASHEET
C master EEPROM interface are shared interfaces.
MII
LAN9303M/
LAN9303Mi
20
MII
10/100
PHY
I
2
C EEPROM/
RMII
MIIM/
I
SMI
2
2
2
LAN9303M/
LAN9303Mi
C slave
C interface. Once operational, if managed, the CPU
C interface or the SMI/MIIM (Media Independent
RMII
10/100
MAC
I
2
C EEPROM/
MIIM/
I
SMI
2
C slave
I
2
C
EEPROM
(optional)
I
2
C
EEPROM
(optional)
2
SMSC LAN9303M/LAN9303Mi
C managed as detailed in
2
C). The slave
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