LAN83C183 Datasheet, PDF (65/113 Pages) SMSC Corporation – FAST ETHERNET PHYSICAL LAYER DEVICE

BYP_ENC Bypass Encoder/Decoder Select
BYP_ENC
Bit Meaning
1 Bypass 4B/5B Encoder/Decoder
0 Normal (default)
R/W 11
BYP_SCR Bypass Scrambler/Descrambler Select
BYP_SCR
Bit Meaning
1 Bypass Scrambler/Descrambler
0 Normal (default)
R/W 10
UNSCR_DISUnscrambled Idle Reception Disabled
UNSCR_DIS
Bit
Meaning
1
Disable AutoNegotiation with devices that
transmit unscrambled idle on powerup and
various instances
0
Enable AutoNegotiation with devices that
transmit unscrambled idle on powerup and
various instances (default)
R/W 9
EQLZR
EQLZR
Bit
1
0
Receive Equalizer Select
R/W 8
Meaning
Receive equalizer disabled (set to zero length)
Receive equalizer on (for 100 Mbits/s mode only)
(default)
CABLE
CABLE
Bit
1
0
Cable Type Select
Meaning
STP (150 Ohm)
UTP (100 Ohm) (default)
R/W 7
RLVL0
RLVL0
Bit
1
0
Receive Input Level Adjust
R/W 6
Meaning
Receive squelch levels reduced by 4.5 dB
Normal (default)
SMSC DS – LAN83C183
65
Rev. 12/14/2000