User manual
Other Capabilities of the Development Board
2004 Microchip Technology Inc. DS51266C-page 37
5.5 EXTERNAL BUS CONNECTIONS
The MCP2515 can be connected to an external CAN bus through the DB9(s). The DB9
pinout is the same as the defacto standard, as recommended by the CAN in
Automation (CiA) group. At a minimum, CANH (pin 7) and CANL (pin 2) must be
connected. However, CAN_GND (pin 3) and CAN_V+ (pin 9) may also be connected
to supply power to and from another board. Table 5-1 and Figure 5-3 show the pinout
and connector, respectively.
TABLE 5-1: CAN CONNECTOR PINOUT
FIGURE 5-3: EXTERNAL CAN BUS CONNECTOR
Note: If supplying power to or from the MCP2515, be sure the voltage regulator
specification is not violated.
Pin# Name Description
1—Reserved
2 CANL CAN low bus line
3 CAN_GND CAN ground
4—Reserved
5 N/C Not connected
6 N/C Not connected
7 CANH CAN high bus line
8—Reserved
9 CAN_V+ CAN power
54321
Reserv
e
d
CANL
CA
N_G
ND
Reserve
d
N/C
9876
N/
C
CANH
N/
C
CA
N_V+