LAN91C111 Datasheet, PDF (70/125 Pages) SMSC Corporation – 10/100 Non-PCI Ethernet Single Chip MAC + PHY

LAN91C111
9.2.9 CAP_ANEG - AUTO-NEGOTIATION CAPABLE
Indicates the ability (‘1’) to perform ANEG or not (‘0’).
9.2.10 LINK - LINK STATUS
A ‘1’ indicates a valid Link and a ‘0’ and invalid Link. The ‘0’ condition is latched until this register is read.
9.2.11 JAB - JABBER DETECT
Jabber condition detected when ‘1’ for 10Mbps. ‘1’ latched until this register is read or the PHY is reset. Always ‘0’ for
100Mbps
9.2.12 EXREG - EXTENDED CAPABILITY REGISTER
‘1’ Indicates extended registers are implemented
9.3 Register 2&3. PHY Identifier Register
These two registers (offsets 2 and 3) provide a 32-bit value unique to the PHY.
REG
2
3
3
3
Bits
15-0
15-10
9-4
3-0
Name
Company ID
Company ID
Manufacturer's ID
Manufacturer's Revision #
Default Value
0000000000010110
111110
000100
----
R/W
Soft Reset
R
Retains Original Value
R
Retains Original Value
R
Retains Original Value
R
Retains Original Value
9.4 Register 4. Auto-Negotiation Advertisement Register
NP
ACK
RW
R
0
0
RF
Reserved Reserved Reserved
T4
TX_FDX
RW
RW
RW
RW
RW
RW
0
0
0
0
0
1
TX_HDX
RW
1
10_FDX
RW
1
10_HDX
RW
1
Reserved
RW
0
Reserved
RW
0
Reserved
RW
0
Reserved
RW
0
CSMA
RW
1
This register control the values transmitted by the PHY to the remote partner when advertising its abilities.
9.4.1 NP - NEXT PAGE
A ‘1’ indicates the PHY wishes to exchange Next Page information.
9.4.2 ACK - ACKNOWLEDGE
It is used by the Auto-Negotiation function to indicate that a device has successfully received its Link Partner’s Link code
Word.
9.4.3 RF - REMOTE FAULT
When set, an advertisement frame will be sent with the corresponding bit set. This in turn will cause the PHY receiving
it to set the Remote Fault bit in its Status register
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DS00002276A-page 71