IBM PowerPC 405GP - Page 551

19.7.9 Individual Address Low (EMACO_IALR)
EMACO_IALR contains the low-order word of the station unique individual address.
During packet reception,
EMACO_IALR is compared with the corresponding address bits of the
received packet.
During packet transmission,
EMACO_IALR is used in source address inclusionlreplacement and as
the source address field in the self-assembled control (pause) packet.
1
0
Figure 19-2~. Individual Address Low Register (EMACO_IALR)
Low-order bits of Receive Individual
Address or Transmit Source Address
19.7.10 VLAN TPID Register (EMACO_VTPID)
EMACO_ VTPID contains the value of the VLAN TPID (Tag Protocol Identifier) field.
31\
During packet reception, packet bytes 13 and 14 are compared to the content of this register to check
whether the packet is tagged with a VLAN
10.
During packet transmission, EMAC uses EMACO_ VTPID when VLAN Tag replacement or VLAN Tag
inclusion mode is chosen.
The value of this register must be a Type field
(8100).
VIDT
*
\0
1S\16
31\
Figure 19-24. VLAN TPID Register (EMACO_ VTPID)
19.7.11 VLAN TCI Register (EMACO_VTCI)
EMACO_ VTCI contains the value of the VLAN TCI (Tag Control Information) field.
During packet transmission, EMAC uses
EMACO_VTCI when VLAN Tag replacement or VLAN Tag
inclusion mode is chosen.
19-36 PPC40SGP User's Manual
Preliminary