SMSC LAN91C111 32/16/8-Bit Three-In-One Fast Ethernet Controller
SMSC AN 9.6 29 Revision 1.0 (08-14-08)
APPLICATION NOTE
Table 4.3 - LAN91C111 Manual Configuration Mode Register Bill Settings
4.7.1 Initialization Sequence Steps
The Auto-Negotiation mode can be turned on/off by setting or clearing the ANEG bit in the MAC
Receive/PHY Control Register. Note that ANEG bit defaults low, the chip powers up with the
AutoNegotiation mode off.
The AutoNegotiation algorithm can be initiated by the following events:
The device enters a Link Fail state
AutoNegotiation Reset or enabled
WHAT DO YOU
WANT TO DO?
AUTO-
NEGOTIATION
CONTROL BITS
SPEED AND DUPLEX MODE CONTROL FOR THE
PHY
DUPLEX
MODE
CONTROL
FOR THE
MAC
Try to Manually
Set to......
ANEG
Bit
ANEG_EN
Bit
SPEED
Bit
DPLX
Bit
SPEED
Bit
DPLX
Bit
SWFDUP
Bit
RPCR
(MAC
Bank 0
Offset
A)
Register 0
(PHY)
RPCR (MAC
Bank 0
Offset A)
RPCR
(MAC
Bank 0
Offset A)
Register 0
(PHY)
Register 0
(PHY)
Transmit
Control
Register
(MAC)
100 Full Duplex 0 0 1 1 X X 1
01 1 1 X X 1
10 X X 1 1 1
100 Half Duplex 0 0 1 0 X X 0
01 1 0 X X 0
10 X X 1 0 0
10 Full Duplex 0 0 0 1 X X 1
01 0 1 X X 1
10 X X 0 1 1
10 Half Duplex 0 0 0 0 X X 0
01 0 0 X X 0
10 X X 0 0 0
