Schematic

1
1
2
2
3
3
4
4
D D
C C
B B
A A
Title
Number RevisionSize
A4
Date: 2015/4/20 Sheet of
File: E:\PCB\..\RS485 CAN Shield.SchDoc Drawn By:
RO
1
RE
2
DE
3
DI
4
GND
5
A
6
B
7
VCC
8
U1
MAX485
1
2
485 2
Header 2
1
2
485 1
Header 2
3V3
GND
120R
R1
485_E
D
1
GND
2
VCC
3
R
4
Rs
8
CANH
7
CANL
6
Vref
5
U2
SN65HVD230
CAN_TX
CAN_RX 120R
R3
1K
R2
GND
1
2
CAN 1
Header 2
1
2
CAN 2
Header 2
GND
3V3
1
3
2
4
P3TX1
TX2
RX1
RX2
D14
D15
485_TX 485_RX CAN_TX
CAN_RX
PWR_LED
R6
1k
1
2
3
4
5
6
7
8
H1
1
2
3
4
5
6
7
8
H4
1
2
3
4
5
6
7
8
9
10
H3
1
2
3
4
5
6
H2
IOREF
NRST
3V3
5V
GND
GND
VIN
A0
D15
D14
AVDD
GND
D13
D12
D11
D10
D9
TX1
D7
D6
RX1
D5
PB_5
D3
TX2
RX2
3V3 GND
NC
EXTENS POWER
CAN JMP
485 Chip Selection
485 RXD/TXD JMP
485 Reciving Circuit CAN Reciving Circuit
Extension Interface
RS485 CAN Shield
A1
A2
A3
A4
A5
485_TX
485_RX
3V3
GND
5V
GND
C3
104
C4
104
GND
C1
104
GND
C2
104
aveshare
W
1
3
5
2
4
6
P1
Header 3X2
H
L
B
A
1
2
P2
Header 2
D7
485_E
1
3
5
2
4
6
Header3X2
Header 3X2
5V
GND
3V33V3
GND
5V
3V3 5V
R4
NC
R5
NC