Figure 5.17. fast ethernet schematic, De2-70 user manual – SIGMA DE2-70 User Manual
Page 54
DE2-70 User Manual
51
SPEED
ENET_D0
ENET_D15
ENET_D13
ENET_D1
ENET_D4
ENET_D12
ENET_D9
ENET_D11
ENET_D8
ENET_D6
ENET_D14
ENET_D10
ENET_D7
ENET_D2
ENET_D3
ENET_D5
RX-
TX+
TX-
SPEED
RX+
ACT
ACT
ENET_D[0..15]
25MHZ
ENET_CS_n
ENET_RESET_n
ENET_IOW_n
ENET_IOR_n
ENET_CMD
ENET_INT
CHSGND
CHSGND
NGND
NGND
NGND
N_VCC33
N_VCC33
N_VCC33
N_VCC33
N_VCC33
N_VCC33
N_VCC33
N_VCC25
NGND
N_VCC25
C17
10u
C17
10u
BC37
0.1u
BC37
0.1u
L2
BEAD
L2
BEAD
BC36
0.1u
BC36
0.1u
R71
4.7K
R71
4.7K
R75
49.9
R75
49.9
R70
6.8K
R70
6.8K
R77
120
R77
120
R78
120
R78
120
R74
49.9
R74
49.9
L1
BEAD
L1
BEAD
C18
0.1u
C18
0.1u
R72
4.7K
R72
4.7K
R73
49.9
R73
49.9
DM9000A-8/16bi
t
U9
DM9000AE
DM9000A-8/16bi
t
U9
DM9000AE
BGRES
1
RXVDD25
2
RX+
3
RX-
4
RXGND
5
TXGND
6
TX+
7
TX-
8
TXVDD25
9
SD7
10
SD6
11
SD5
12
SD
4
13
SD
3
14
GN
D
15
SD
2
16
SD
1
17
SD
0
18
EE
D
IO
19
EE
D
C
K
20
EE
D
C
S
21
W
AKE/SD
1
5
22
VD
D
23
L
E
D3
/S
D1
4
24
GP6/SD13
25
GP5/SD12
26
GP4/SD11
27
GP3/SD10
28
GP2/SD9
29
VDD
30
GP1/SD8
31
CMD
32
GND
33
INT
34
IOR#
35
IOW#
36
CS
#
37
LE
D
2
38
LE
D
1
39
PW
RS
T
#
40
T
EST
41
VD
D
42
X2
43
X1
44
GN
D
45
SD
46
RX
G
ND
47
BG
G
N
D
48
R76
49.9
R76
49.9
YELLOW
GREEN
J6
RJ45INTLED
YELLOW
GREEN
J6
RJ45INTLED
CTT
4
RD-
6
CTR
5
TD-
2
TD+
1
RD+
3
CHSG
8
SM
NT
0
13
SM
NT
1
14
MN
T
1
15
MN
T
0
16
D1
9
D2
10
D3
11
D4
12
C19
0.1u
C19
0.1u
Figure 5.17. Fast Ethernet schematic.
Signal Name
FPGA Pin No.
Description
ENET_DATA[0] PIN_A23
DM9000A
DATA[0]
ENET_DATA[1] PIN_C22
DM9000A
DATA[1]
ENET_DATA[2] PIN_B22
DM9000A
DATA[2]
ENET_DATA[3] PIN_A22
DM9000A
DATA[3]
ENET_DATA[4] PIN_B21
DM9000A
DATA[4]
ENET_DATA[5] PIN_A21
DM9000A
DATA[5]
ENET_DATA[6] PIN_B20
DM9000A
DATA[6]
ENET_DATA[7] PIN_A20
DM9000A
DATA[7]
ENET_DATA[8] PIN_B26
DM9000A
DATA[8]
ENET_DATA[9] PIN_A26
DM9000A
DATA[9]
ENET_DATA[10] PIN_B25
DM9000A
DATA[10]
ENET_DATA[11] PIN_A25
DM9000A
DATA[11]
ENET_DATA[12] PIN_C24
DM9000A
DATA[12]
ENET_DATA[13] PIN_B24
DM9000A
DATA[13]
ENET_DATA[14] PIN_A24
DM9000A
DATA[14]
ENET_DATA[15] PIN_B23
DM9000A
DATA[15]
ENET_CLK
PIN_D27
DM9000A Clock 25 MHz
ENET_CMD
PIN_B27
DM9000A Command/Data Select, 0 = Command, 1 = Data