LAN83C183 Datasheet, PDF (13/113 Pages) SMSC Corporation – FAST ETHERNET PHYSICAL LAYER DEVICE

Interframe
Gap
Figure 1.2 100BASE-TX/FX and 10BASE-T Frame Format
PREAMBLE
Ethernet MAC Frame
SFD
DA
SA
Interframe
LN LLC Data FCS
Gap
IDLE
100BASE-TX Data Symbols
SSD PREAMBLE SFD
DA
SA
LN LLC DATA FCS ESD IDLE
IDLE = ^{[ 1 1 1 1 ...]}
SSD = ^{[ 1 1 0 0 0 1 0 0 0 1 ]}
PREAMBLE = ^{[ 1 0 1 0 ...] 62 Bits Long}
SFD = ^{[ 1 1 ]}
DA, SA, LN, LLC DATA, FCS = ^{[ DATA ]}
ESD = ^{[ 0 1 1 0 1 0 0 1 1 1 ]}
Before/After
4B5B Encoding,
Scrambling, and
MLT3 Coding
IDLE
100BASE-FX Data Symbols
SSD PREAMBLE SFD
DA
SA
LN LLC DATA FCS ESD IDLE
IDLE
IDLE = ^{[ 1 1 1 1 ...]}
SSD = ^{[ 1 1 0 0 0 1 0 0 0 1 ]}
PREAMBLE = ^{[ 1 0 1 0 ...] 62 Bits Long}
SFD = ^{[ 1 1 ]}
DA, SA, LN, LLC DATA, FCS = ^{[ DATA ]}
ESD = ^{[ 0 1 1 0 1 0 0 1 1 1 ]}
Before/After
4B5B Encoding
PREAMBLE
10BASE-T Data Symbols
SFD
DA
SA
LN LLC DATA FCS SOI IDLE
IDLE = ^{[ No Transitions ]}
PREAMBLE = [ 1 0 1 0 ...] 62 Bits Long
SFD = [ 1 1 ]
DA, SA, LN, LLC DATA, FCS = [ DATA ]
SOI = [ 1 1 ] With No MID Bit
Transition
Before/After
Manchester
Encoding
SMSC DS – LAN83C183
13
Rev. 12/14/2000