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Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
Datasheet
Revision 1.4 (08-19-08) 324 SMSC LAN9311/LAN9311i
DATASHEET
14.5.2 Switch Port 0, Port 1, and Port 2 CSRs
This section details the switch Port 0(Host MAC), Port 1, and Port 2 CSRs. Each port provides a
functionally identical set of registers which allow for the configuration of port settings, interrupts, and
the monitoring of the various packet counters.
Because the Port 0, Port 1, and Port 2 CSRs are functionally identical, their register descriptions have
been consolidated. A lowercase “x” has been appended to the end of each switch port register name
in this section, where “x” should be replaced with “MII”, “1”, or “2” for the Port 0, Port 1, or Port 2
registers respectively. A list of the Switch Port 0, Port 1, and Port 2 registers and their corresponding
register numbers is included in Table 14.12.
14.5.2.1 Port x MAC Version ID Register (MAC_VER_ID_x)
This read-only register contains switch device ID information, including the device type, chip version
and revision codes.
Register #: Port0: 0400h Size: 32 bits
Port1: 0800h
Port2: 0C00h
BITS DESCRIPTION TYPE DEFAULT
31:12 RESERVED RO -
11:8
Device Type Code (DEVICE_TYPE) RO 5h
7:4
Chip Version Code (CHIP_VERSION) RO 8h
3:0
Revision Code (REVISION) RO 3h