DM8203
2-port switch with MII / RMII Interface
8.5 Auto-negotiation Advertisement Register (ANAR) – 04H
This register contains the advertised abilities of this DM8203 device as they will be transmitted to its link partner
during Auto-negotiation.
Bit
Bit Name
Default
Description
15
NP
0,RO/P
Next page Indication
0 = No next page available
1 = Next page available
The DM8203 has no next page, so this bit is permanently set to 0
Acknowledge
14
ACK
0,RO
1 = Link partner ability data reception acknowledged
0 = Not acknowledged
The DM8203's auto-negotiation state machine will automatically
control this bit in the outgoing FLP bursts and set it at the
appropriate time during the auto-negotiation process. Software
should not attempt to write to this bit.
Remote Fault
13
RF
0, RW
1 = Local device senses a fault condition
0 = No fault detected
12-11
10
Reserved
FCS
X, RW
0, RW
Reserved
Write as 0, ignore on read
Flow Control Support
1 = Controller chip supports flow control ability
0 = Controller chip doesn’t support flow control ability
100BASE-T4 Support
9
T4
0, RO/P
1 = 100BASE-T4 is supported by the local device
0 = 100BASE-T4 is not supported
The DM8203 does not support 100BASE-T4 so this bit is
permanently set to 0
8
7
TX_FDX
TX_HDX
10_FDX
10_HDX
Selector
1, RW
1, RW
1, RW
1, RW
100BASE-TX Full Duplex Support
1 = 100BASE-TX full duplex is supported by the local device
0 = 100BASE-TX full duplex is not supported
100BASE-TX Support
1 = 100BASE-TX half duplex is supported by the local device
0 = 100BASE-TX half duplex is not supported
10BASE-T Full Duplex Support
1 = 10BASE-T full duplex is supported by the local device
0 = 10BASE-T full duplex is not supported
10BASE-T Support
1 = 10BASE-T half duplex is supported by the local device
0 = 10BASE-T half duplex is not supported
6
5
4-0
<00001>, RW Protocol Selection Bits
These bits contain the binary encoded protocol selector supported
by this node
<00001> indicates that this device supports IEEE 802.3 CSMA/CD
Preliminarydatasheet
DM8203-15-DS-P05
October 23, 2008
35
DAVICOM [ DAVICOM SEMICONDUCTOR, INC. ]
