SMSC LAN9312 - Manual (Page 375)

High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
SMSC LAN9312 375 Revision 1.4 (08-19-08)
DATASHEET
14.5.3.8 Switch Engine VLAN Command Register (SWE_VLAN_CMD)
This register is used to read and write the VLAN or Port VID tables. A write to this address performs
the specified access.
For a read access, the Operation Pending bit in the Switch Engine VLAN Command Status Register
(SWE_VLAN_CMD_STS) indicates when the command is finished. The Switch Engine VLAN Read
Data Register (SWE_VLAN_RD_DATA) can then be read.
For a write access, the Switch Engine VLAN Write Data Register (SWE_VLAN_WR_DATA) register
should be written first. The Operation Pending bit in the Switch Engine VLAN Command Status
Register (SWE_VLAN_CMD_STS) indicates when the command is finished.
Register #: 180Bh Size: 32 bits
BITS DESCRIPTION TYPE DEFAULT
31:6 RESERVED RO -
5 VLAN RnW
This bit specifies a read(1) or a write(0) command. R/W 0b
4 PVIDnVLAN
When set, this bit selects the Port VID table. When cleared, this bit selects
the VLAN table. R/W 0b
3:0 VLAN/Port
This field specifies the VLAN(0-15) or port(0-2) to be read or written.
Note: Values outside of the valid range may cause unexpected results.
R/W 0h