ADDR=B_0x0, CSVL=B_0x0, VLC=B_0x0
VLAN inclusion register
| VLT | VLAN Tag for Transmit Packets This field contains the value of the VLAN tag to be inserted or replaced. The value must only be changed when the transmit lines are inactive or during the initialization phase. The following list describes the bits of this field: Bits[15:13]: User Priority Bit 12: Canonical Format Indicator (CFI) or Drop Eligible Indicator (DEI) Bits[11:0]: VLAN Identifier (VID) field of VLAN tag |
| VLC | VLAN Tag Control in Transmit Packets Note: Changes to this field take effect only on the start of a packet. If you write this register field when a packet is being transmitted, only the subsequent packet can use the updated value, that is, the current packet does not use the updated value. 0 (B_0x0): No VLAN tag deletion, insertion, or replacement 1 (B_0x1): VLAN tag deletion. The MAC removes the VLAN type (bytes 13 and 14) and VLAN tag (bytes 15 and 16) of all transmitted packets with VLAN tags. 2 (B_0x2): VLAN tag insertion. The MAC inserts VLT in bytes 15 and 16 of the packet after inserting the Type value (0x8100 or 0x88a8) in bytes 13 and 14. This operation is performed on all transmitted packets, irrespective of whether they already have a VLAN tag. 3 (B_0x3): VLAN tag replacement. The MAC replaces VLT in bytes 15 and 16 of all VLAN-type transmitted packets (Bytes 13 and 14 are 0x8100 or 0x88a8). |
| VLP | VLAN Priority Control When this bit is set, the control bits[17:16] are used for VLAN deletion, insertion, or replacement. When this bit is reset, bits[17:16] are ignored. |
| CSVL | C-VLAN or S-VLAN When this bit is set, S-VLAN type (0x88A8) is inserted or replaced in the 13th and 14th bytes of transmitted packets. When this bit is reset, C-VLAN type (0x8100) is inserted or replaced in the 13th and 14th bytes of transmitted packets. 0 (B_0x0): C-LAN 1 (B_0x1): S-LAN |
| VLTI | VLAN Tag Input When this bit is set, it indicates that the VLAN tag to be inserted or replaced in Tx packet should be taken from the Tx descriptor. |
| CBTI | Channel based tag insertion When this bit is set, outer VLAN tag is inserted for every packets transmitted by the MAC. The tag value is taken from the queue/channel specific VLAN tag register. This will override VLTI, VLP, VLC and VLT fields of this register When this bit is set, a write operation to byte 3 of this register initiates the read/write access to the indirect register. When reset outer VLAN operation is based on the setting of VLTI, VLP, VLC and VLT fields of this register |
| ADDR | Address This field selects one of the queue/channel specific VLAN Inclusion register for read/write access This does not have any effect when CBTI is reset 0 (B_0x0): VLAN tag for insertion in the Transmit packets from Tx Queue 0 1 (B_0x1): VLAN tag for insertion in the Transmit packets from Tx Queue 1 |
| RDWR | Read write control This bit controls the read or write operation for indirectly accessing the queue/channel specific VLAN Inclusion register. When set indicates write operation and when reset indicates read operation This has no effect when CBTI is reset |
| BUSY | Busy This bit indicates the status of the read/write operation of indirect access to the queue/channel specific VLAN inclusion register. For write operation write to a register is complete when this bit is reset. For read operation the read data is valid when the bit is reset. No further writes are allowed to this register when this bit is set. This does not have any effect when CBTI is reset |