DM8203
2-port switch with MII / RMII Interface
11.Application circuit
11.1 Main circuit
J7 on is P2 force link mode (100Mbus FULL mode)
J8 on is P2 fix mode (100Mbps mode)
J9, J10 on is P2 use Reverse-MII mode
J11 on is P2 use RMII mode
DVDD_33V
DVDD_18V
DVDD_5V
I
DVDD_33V
AP1117-3.3V
U6
IN
DVDD_33V DVDD_33V
O
OUT
OUT
C1
220uF
C2
0.1uF
C3
0.1uF
C4
0.1uF
C5
C6
220uF
C7
0.1uF
4
0.1uF
C31
220uF
C32
0.1uF
U7
RESET_IC_(AP1701DW)
DVDD_33V
J5 on is use EEPROM
D5
1N4148
R22
10K
J7
J8
JUMPER
JUMPER
PWRST#
TXE2
EECK
1
1
2
2
R23
R24
4.7k
4.7k
AVDD_33V
AVDD_18V
R50
0
SW1
DVDD_33V
R1 330
TXD2_2
TXC2
J9
1
1
2
2
JUMPER
JUMPER
R25
RXC2
4.7k
4.7k
J10
LNK0_LED
SPD0_LED
LNK1_LED
SPD1_LED
C
LEDA
C
D1
D3
LEDA
LEDA
4
3
2
1
5
6
7
8
C30
C
C
D2
D4
power on reset
(select one
use)
J11
C12
220uF
C13
0.1uF
C14
0.1uF
C15
220uF
C16
C17
0.1uF
10uF
TXD2_3
1
2
JUMPER
R26
0.1uF
LEDA
Port
Port
0
1
fix FX mode
fix FX mode
EECS
R27
R28
R29
R30
NC(4.7k)
NC(4.7k)
NC(4.7k)
NC(4.7k)
TXER2
TXD2_0
TXD2_1
DVDD_33V
EEPROM
DVDD_33V
L1
AVDD_33V
J5
JUMPER
1
Disable Port
2 MDIO pull Low, TXE2 float (J7 off).
U2
Enable pot 2, please remove MDIO pull Low resister
(R51)
AVDD_18V
EECS
EECK
EEDIO
2
1
8
7
6
5
MDIO
R51
4.7k
CS VCC
SK DC
DI ORG
DO GND
U1
F.B/120/SO805
2
3
4
C19
0.1uF
RX0-
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
JP1 RJ-45_LED
TXD2_0
TXD2_1
RXER2
R52
R53
R31
4.7k
4.7k
4.7k
RD-
NC
RD+
NC
CT
TD-
NC
TD+
RX+
NC
RX-
MCT
NC
TX+
NC
TX-
2SB1386
B
E
1
2
3
4
5
6
7
8
VCNTL
Q1
DVDD_18V
RX0+
C
AVDD_18V
R13 10K
93LC46
L2
DVDD_5V
1
TX0-
JP6
DC-JACK
F.B/120/SO805
Y1
X1
1
2
X2
TX0+
C21
0.1uF
C22
0.1uF
L3
25MHz/49US
C27 C28
22pF 22pF
MAGCOM_HS9024
R4
R5
R6
R7
F.B/120/SO805
49.9/1%
49.9/419%.9/1%
49.9/1%
R8
R9
R10
75/1% 75/1% 75/1%
C8
1.4K/1%
R14
C9
0.1uF
C10
0.1uF
C11
0.1uF
0.01uF/2KV
RJ45_SPD
JP3
HEADER_16X2
DVDD_33V DVDD_5V
R11 512
AVDD_33V AVDD_18V
DVDD_18DVVDD_33V
RJ45_LINK R12 512
VREF
U3A
74HC04
C18
C29
0.1uF
SPD0_LED
LNK0_LED
1
3
2
U3B
0.1uF
C20
U5
4
JP5
VCNTL
VREF
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
74HC04
0.1uF
FX_SD
R33
1
VCNTL
VREF
DVDD33
X1
X2
DGND
LNK1_LED
SPD1_LED
LNK0_LED
SPD0_LED
TEST2
SMI_CK
DVDD18
SMI_DIO
TEST3
TEST1
DVDD_33V
DGND
PWRST#
EECS
PWRST#
FX_SD_TEST
X1
X2
EECS
EECK
EEDIO
C24
0.1uF
R15
R16
EECK
49.9/1%
49.9/1%
EEDIO
DVDD33
RXD2_0
RXD2_1
DGND
RXD2_2
RXD2_3
RXDV2
RXC2
LNK1_LED
SPD1_LED
LNK0_LED
SPD0_LED
R32
R34
127/1%69/1%
R35
R36
69/1%
DM8203E
3 Port
switch
AVDD_18V
RXD2_0
RXD2_1
JP2
127/1% 127/1%
JP4
U4
8
7
6
5
4
3
2
1
RX1- R46
0
0
TP_RX-
TP_RX+
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1
RD-
NC
RD+
NC
RX-
NC
RX+
MCT
NC
TX-
NC
RXD2_2
RXD2_3
RXDV2
RXC2
RXER2
COL2
RX1+ R37
RX1- R38
0
0
FX_RX+
FX_RX-
FX_SD
2
3
4
5
6
7
8
9
SMI_CK
RX1+ R47
SMI_DIO
CT
TX1- R48
TX1+ R49
0
0
TP_TX-
TP_TX+
RXER2
COL2
TD-
NC
TD+
TX1- R39
TX1+ R40
0
0
FX_TX-
FX_TX+
DGND
TX+
MAGCOM_HS9016
RJ-45
R17
R18
R41
83/1%
R42
83/1%
R43
83/1% 182/1%
R44
R45
182/1%
Fiber_3.3v
49.9/1%
49.9/1%
R19 R20 R21
75/1% 75/1% 75/1%
C23
DM8203E
C25
0.1uF
C26
0.1uF
0.01uF/2KV
DAVICOM Semiconductor Inc.
Title
DM8203E_EVB circuit f or DM8203-E5
Size
B
Document Number
DM8203E EVB
Rev
V1.0
Date:
Tuesday , August 26, 2008
Sheet
1
of
1
60
Preliminary datasheet
DM8203-15-DS-P05
October 23, 2008
DAVICOM [ DAVICOM SEMICONDUCTOR, INC. ]
