dp83840a National Semiconductor Corporation, dp83840a Datasheet - Page 47

• Manufacturer Part Number: dp83840a
• Description: 10/100 Mb/s Ethernet Physical Layer
• Manufacturer: National Semiconductor Corporation

Version A
4.0 Registers
4.6 AUTO-NEGOTIATION ADVERTISEMENT REGISTER (ANAR)
Address 04h
This register contains the advertised abilities of this DP83840A device as they will be transmitted to its Link Partner
during Auto-Negotiation.
12:10
4:0
Bit
15
14
13
9
8
7
6
5
Bit Name
Reserved
Selector
TX_FD
10_FD
ACK
NP
RF
TX
T4
10
(Continued)
<00001>,
0, RO/P
0, RO/P
0, RO/P
Default
X, RW
0, RW
1, RW
1, RW
1, RW
1, RW
RW
NEXT PAGE INDICATION:
0 = Not Next Page able
1 = Next Page able
The DP83840A is not Next Page capable so this bit is permanently set
to 0.
ACKNOWLEDGE:
1 = Reception of Link Partner ability data acknowledged
0 = Not acknowledged
The DP83840A's Auto-Negotiation state machine will automatically
control this bit in the outgoing FLP bursts, setting it at the appropriate
time during the Auto-Negotiation process. Software should not attempt
to write to this bit.
REMOTE FAULT:
1 = Advertises that this device has detected a Remote Fault
0 = No Remote Fault detected
RESERVED: Write as 0, read as don't care.
100BASE-T4 SUPPORT:
1 =100BASE-T4 is supported by the local device
0 =100BASE-T4 not supported
set to 0.
100BASE-TX FULL DUPLEX SUPPORT:
1 = 100BASE-TX Full Duplex is supported by the local device
0 = 100BASE-TX Full Duplex not supported
100BASE-TX SUPPORT:
1 = 100BASE-TX is supported by the local device
0 = 100BASE-TX not supported
10BASE-T FULL DUPLEX SUPPORT:
1 = 10BASE-T Full Duplex is supported by the local device
0 = 10BASE-T Full Duplex not supported
10BASE-T SUPPORT:
1 = 10BASE-T is supported by the local device
0 = 10BASE-T not supported
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
The DP83840A does not support 100BASE-T4 so this bit is permanently
47
National Semiconductor
Description