AM79C873 Advanced Micro Devices, AM79C873 Datasheet - Page 42

• Manufacturer Part Number: AM79C873
• Description: NetPHY -1 10/100 Mbps Ethernet Physical Layer Single-Chip Transceiver with 100BASE-FX Support
• Manufacturer: Advanced Micro Devices

NetPHY-1 MII Example Schematic
42
GND
GND
VCC
VCC
R24
R30
R24
R30
130
370
130
82
GND
FXSD+
VCC
SW SPST
PHAD0
PHAD1
PHAD2
GND
VCC
PHAD3
PHAD4
OPMD0
OPMD1
OPMD2
OPMD3
NODEB
BPAGN
BP45B
BPSCR
10SER
GND
GND
TMODE
S1
10K
10u
R9
C1
FXSD-
100
82
83
84
85
86
87
88
89
90
92
93
94
95
96
97
98
99
81
91
RESET#
PHYAD0
PHYAD1
PHYAD2
DGND
DVCC
PHYAD3
PHYAD4
OPMODE1
RPTR/NODE#
BPALIGN
BP4B5B
BPSCR
10BTSER
TESTMODE
OPMODE0
OPMODE2
OPMODE3
AGND
AGND
VCC
VCC
FXRD+
R35
R39
130
82
GND
.1u
220
R1
C26
.1u
GND
C18
R36
FXRD-
R40
130
82
P R E L I M I N A R Y
TP19
Am79C873
Am79C873
NetPHY-1
R32
300
FXSD
1.5K
TP18
300
R2
R37
TP17
VCC
220
R3
R33
R38
.1u
C23
FXSD
62
62
49.9 1%
VCC
R29
R34
49.9 1%
FXRD+
TP15
VCC
FXRD-
Load these components
TP16
or OSC1+ R12.
FXTD-
FXSD
OSC/XTL#
FDXLED#
RX_LOCK
SPEED10
LINKSTS
FXTD+
CLK25M
TRIDRV
AGND
BGRET
BGRES
Y1
GND
DVCC
DGND
DGND
DGND
DGND
AGND
DVCC
AVCC
C16
18P
UTP
GND
GND
NC
VCC_T
VCC_R
25M
41
40
39
38
37
36
35
34
33
32
31
U1
50
49
48
47
46
45
44
43
42
GND
HFBR5103T
DM9101F
C16, C17
FX1
9
8
7
6
5
4
3
2
1
RXLOCK
C17
18P
FDXLED
CLK25M
SPEED
SIGOK
XTLB
GND
GND
GND
GND
VCC
VCC
GND
GND
VCC
#12
#15
SD
*