Network Interface - Brother HL-2030 Service Manual

CHAPTER 3 THEORY OF OPERATION
1.3.4

Network interface

It uses the National Semiconductor brand 10 Base-T/100 Base-TX network controller
(LAN91C1131-NE). The pulse transformer and the Link/Active LED are built in the RJ-45
connector.
< HL-2070N >
0V
LAN_RST
DATA[15-0]
1-1B/4F
LAN
X4
C164
U15
127
C10P AT-49 25.00MHZ
XTAL1
R129
3.3k
R131 128
XTAL2
220
C171
C10P
41
LAN_CSN AEN
1-3C
31
IORDN nRD
1-3C/5D/7D
32
nWR
IOWEN
1-3C/5C
29
INTR0
LAN_INT
1-1C
30
R156 1k
RESET
1-3C
C187
C102
45
TP220 nLDEV
38
TP222 ARDY
0V
43
TP224 nSRDY
RA18
TP233
40
VDD3 nVLBUS
8
1
TP232
36
W/nR
2 7
TP234
46
nRDYRTN
3 6
TP229
35
nCYCLE
4 5
10k
TP231
37
10k
R159
nADS
TP235
42
10k
R160
0V LCLK
34
VDD3 VDD(nDATACS)
97
VDD(nBE3)
96
VDD(nBE2)
TP185
95
10k
R132
nBE1
TP186
94
10k
R133
nBE0
0V
ADR[2] 78
A1
ADR[3] 79
A2
ADR[4] 80
A3
ADR[5] 81
A4
ADR[6] 82
A5
ADR[7] 83
A6
ADR[8] 84
A7
ADR[9] 85
A8
ADR[10] 86
A9
ADR[11] 87
A10
ADR[12] 88
A11
ADR[13] 89
A12
ADR[14] 90
A13
ADR[15] 91
A14
ADR[16] 92
A15
ADR[23-1]
1-3B/4F/4D
107
DATA[8]
D0
8
1
106
DATA[9]
RA14
D1
2 7
105
DATA[10]
33
D2
3 6
104
DATA[11]
D3
4 5
102
DATA[12]
D4
1 8
101
DATA[13]
RA13
D5
2 7
100
DATA[14]
33
D6
3 6
99
DATA[15]
D7
4 5
DATA[0] 76
D8
8
1
75
DATA[1]
RA16
D9
7
2
74
DATA[2]
33
D10
3 6
73
DATA[3]
D11
4 5
71
DATA[4]
D12
1 8
70
DATA[5]
RA15
D13
2 7
69
DATA[6]
33
D14
3 6
68
DATA[7]
D15
4 5
66
VDD3 D16
65
VDD(D17)
64
VDD(D18)
63
VDD(D19)
61
VDD(D20)
60
VDD(D21)
59
VDD(D22)
58
VDD(D23)
56
VDD(D24)
55
VDD(D25)
54
VDD(D26)
53
VDD(D27)
51
VDD(D28)
50
VDD(D29)
49
VDD(D30)
48
VDD(D31)
LAN91C113I-NE
2
nCSOUT TP187
47
TP225
X25OUT
AVDD3
C179
C103
20
10%(B)
nLNK TP215
(1608)
21
LBK TP213
R143
R149
28
49 49
nCNTRL TP219
1%(F)
12 1%(F)
RBIAS (1608) (1608)
TP196
R140 R152
0V 49.9
11k
1%(F)
14 (1608)
TPO+
15
TPO-
49
R147 1%(F) (1608)
TP221
17
TPI+
TP209
18
R145
TPI-
49
1%(F)
(1608)
22
nLEDA LEDA
23 3B
nLEDB
LEDB
3B
124
RXD0 TP198
123
RXD1 TP203
122
RXD2 TP210
121
RXD3 TP188
116
TXD0 TP204
115
TP211
TXD1
114
TP190
TXD2
113
TP200
TXD3
111
TXEN100 TP212
119
CRS100 TP193
112
COL100 TP205
125
TP192
RX_DV
126
TP189
RX_ER
25
TP218
MDI
26
TP217
MDO
27
MCLK TP214
118
RX25 TP199
109
TX25 TP216
3
TP191
IOS0
4
TP194
IOS1
5
TP197
IOS2
6
ENEEP 0V
7
EEDO TP201
8
EEDI
9
EESK TP202
10
EECS TP207
AVDD3
TP226
L3
11 0
VDD3
AVDD11
16 (1608)
AVDD16
C176
C103
(1608)
C178
13
C103
AGND13
(1608)
19 OT1
AGND19 0V
1
VDD1
33
VDD33
44
VDD44
62
VDD62
77
VDD77
98
VDD98
110
VDD110
120
VDD120
C169 C170 C168 C180 C181 C183 C182 C172
24
GND24
39
GND39
52
GND52
57
GND57
67
GND67
72
GND72
93
GND93
103
GND103
108
GND108
117
GND117 0V
Fig. 3-9
3-8
C104 C104
0V
C104
C104
CN15
12 FG
11 FG
IF_FG4
7 LED1_C
LEDA
2B R155
R154 100
8 LED1_A
VDD3
49.9
(1608)
1%(F) 1 TCT
(1608)
2 TD+
3 TD-
4 RD+
5 RD-
6 RCT
R138
100
10 LED3
VDD3
C177
(1608)
9 LED2
C103
LEDB
2B
(1608)
0810-1X1T-03
0V
VDD3
0V
ACTIVE : YELLOW
LINK : GREEN
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