user manual

10/100 Non-PCI Ethernet Single Chip MAC + PHY
Datasheet
SMSC LAN91C111 REV C 13 Revision 1.91 (08-18-08)
DATASHEET
Figure 3.3 LAN91C111 Physical Layer to Internal MAC Block Diagram
C
O
L
L
I
S
I
O
N
4
B
5
B
D
E
C
O
D
E
R
D
E
S
C
R
A
M
B
L
E
R
C
L
O
C
K
&
D
A
T
A
R
E
C
O
V
E
R
Y
A
U
T
O
N
E
G
O
T
I
A
T
I
O
N
&
L
I
N
K
S
Q
U
E
L
C
H
C
L
O
C
K
&
D
A
T
A
R
e
c
o
v
e
r
y
(
M
a
n
c
h
e
s
t
e
r
D
e
c
o
d
e
r
)
L
P
F
I
L
T
E
R
R
O
M
D
A
C
+
-
1
0
B
A
S
E
-
T
T
R
A
N
S
M
I
T
T
E
R
C
L
O
C
K
G
E
N
(
P
L
L
)
M
A
N
C
H
E
S
T
E
R
4
B
5
B
E
N
C
O
D
E
R
S
C
R
A
M
B
L
E
R
T
P
O
+
S
W
I
T
C
H
E
D
C
U
R
R
E
N
T
S
O
U
R
C
E
+
-
1
0
0
B
A
S
E
-
T
X
T
R
A
N
S
M
I
T
T
E
R
C
L
O
C
K
G
E
N
(
P
L
L
)
T
P
O
-
L
P
F
I
L
T
E
R
T
P
I
+
T
P
I
-
L
P
F
I
L
T
E
R
+
-
+
/
-
V
t
h
+
1
0
B
A
S
E
-
T
R
E
C
E
I
V
E
R
M
L
T
3
E
N
C
O
D
E
R
A
D
A
P
T
I
V
E
E
Q
U
A
L
I
Z
E
R
+
+
/
-
V
t
h
+
1
0
0
B
A
S
E
-
T
X
R
E
C
E
I
V
E
R
M
L
T
E
N
C
O
D
E
R
S
Q
U
E
L
C
H
R
B
I
A
S
CSMA/CD
S
1
S
8
D
C
1
EN
B
C
3
C
2
Multiplexer
S
1
S
8
D
C
1
EN
B
C
3
C
2
LS[2-0]B
LED
A
LE
D
nPLED[0-5]
LS[2-0]A
LED
Control
Power
On
Reset
PHY
CONTROLS
TXD[3:0]
TX_ER
TXEN100
TX25
CRS100
COL100
RXD[3:0]
RX_ER
RX_DV
RX25
MCLK
MDO
EECS EESK
EEDO
To MII External Signals
MII
AUTONEG
LOGIC
EEPROM
CONTROL
MDI
MII
SERIAL
Manage
-ment
MII External
Signals
EEDI
Multiplexer
-