CobraNet Hardware User’s Manual
Mechanical Drawings and Schematics
DS651UM23 ©Copyright 2005 Cirrus Logic, Inc. 49
Version 2.3
Figure 29. CM-2 RevF Schematic Page 6 of 7
IOR#
1
IOW#
2
AEN
3
IOWAIT
4
DVDD
5
SD0
6
SD1
7
SD2
8
SD3
9
SD4
10
SD5
11
SD6
12
SD7
13
RST
14
DGND
15
TEST1
16
TEST2
17
TEST3
18
TEST4
19
DVDD
20
X2_25M
21
X1_25M
22
DGND
23
SD
24
BGGND
25
BGRES
26
AVDD
27
AVDD
28
RXI+
29
RXI-
30
AGND
31
AGND
32
TXO+
33
TXO-
34
AVDD
35
DVDD
36
LINK_I
37
RXD0
38
RXD1
39
RXD2
40
RXD3
41
DGND
42
CRS
43
COL
44
RX_DV
45
RX_ER
46
RX_CLK
47
TEST5
48
TX_CLK
49
TXD0
50
TXD1
51
TXD2
52
TXD3
53
TX_EN
54
DVDD
55
MDIO
56
MDC
57
DGND
58
CLK20MO
59
SPEED#
60
DUP#
61
LINKACT#
62
DGND
63
EEDI
64
EEDO
65
EECK
66
EECS
67
GPIO0
68
GPIO1
69
GPIO2
70
GPIO3
71
DVDD
72
DVDD
73
NC
74
NC
75
DGND
76
NC
77
LINK_O
78
WAKEUP
79
PW_RST#
80
DGND
81
SD15
82
SD14
83
SD13
84
SD12
85
SD11
86
SD10
87
SD9
88
SD8
89
DVDD
90
IO16
91
CMD
92
SA4
93
SA5
94
SA6
95
SA7
96
SA8
97
SA9
98
DGND
99
INT
100
U8
DM9000
R23
49.9 Ohm, 1%
R24
49.9 Ohm, 1%
R21
R22
49.9 Ohm, 1%
R26
6.8K Ohm, 1%
C30
0.1 uF
C31
0.1 uF
C32
0.1 uF
C29
0.1 uF
Keep res close to chip pins.
GND
VCC_PHY2 GND
R34
75 Ohm, 1%
R33
R35
R36
R37
R38
75 Ohm, 1%
FB8
FB9
FB10
FB11
FBEAD, 68 Ohm @ 100 MHz
C49
0.01 uF, 2KV
Note: See Text Warning
Warning: Failure to properly install and
configure the aux. Ethernet signals can result in
very bad things (i.e., fire, smoke, bad hair days).
If power is supplied via the RJ-45 connector then
only the ferrite beads are installed (not the
resistors). If power is not supplied via the RJ-45
then the resistors are installed and the beads are
not.
VCC_PHY2VCC_+3.3
VCC_+3.3
VCC_+3.3
DATA0
DATA1
DATA2
DATA3
DATA4
DATA5
DATA6
DATA7
DATA8
DATA9
DATA10
DATA11
DATA12
DATA13
DATA14
DATA15
ADDR[0..19]
DATA[0..15]
ADDR[0..19]
DATA[0..15]
HRESET_BUF#
VCC_+3.3
GND
WE#
MAC_CS#
IOWAIT
HRESET_BUF#
WE#
IOWAIT
MAC_IRQ1
MAC_IRQ1
The secondary Ethernet MAC and connector are optional.
If it is not required then all parts on this page can be depopulated
(or removed entirely from a new design based on this circuit).
ADDR0
ADDR2
ADDR3
ADDR1
ADDR4
VCC_+3.3 VCC_PHY2
C47
0.01 uF
FB7
FBEAD, 68 Ohm @ 100 MHz
C8
10 uF, X5R, 6.3 Volts
C9
10 uF, X5R, 6.3 Volts
VCC_+3.3 VCC_PHY2
1
2
3
45
6
7
8
CN11
0.1 uF, 4x Array
1
2
3
45
6
7
8
CN9
0.1 uF, 4x Array
VCC_+3.3
1
2
3
45
6
7
8
CN10
0.1 uF, 4x Array
GND
12
3
4
5
6
7
8
9
10
RN8
3.3K Ohm, 8x Array
GND
CLK_25
CLK_25
VCC_PHY2OE#
MAC_CS#
OE#
MAC_CS#
12
13
11
U10D
74LVC32
R52
3.3K Ohm
VCC_+3.3
1
2
3
4
5
6
7
8
S1
S2
L1
L2
L3
L4
J6
RJ45
1
2
3
4
5
6 19
20
21
22
23
24
TXD+
TXD-
TXD+
TXD-
RXD+
RXD+
RXD- RXD-
T1A
H2006A
GND
SHIELD
SHIELD
SHIELD
LED_BUF[0..7]
LED_BUF[0..7]
AUX_POWER0
AUX_POWER1
AUX_POWER2
AUX_POWER3
AUX_POWER[0..3]
AUX_POWER[0..3]
LED_BUF4
LED_BUF5
LED_BUF6
LED_BUF7