ST10F276Z5 datasheet(102/239 Pages) STMICROELECTRONICS

102 / 239 page

CAN modules

ST10F276Z5

102/239

16.2

CAN bus configurations

Depending on application, CAN bus configuration may be one single bus with a single or

multiple interfaces or a multiple bus with a single or multiple interfaces. The ST10F276Z5 is

able to support these two cases.

Single CAN bus

The single CAN Bus multiple interfaces configuration may be implemented using two CAN

transceivers as shown in Figure 20.

Figure 20.

Connection to single CAN bus via separate CAN transceivers

The ST10F276Z5 also supports single CAN Bus multiple (dual) interfaces using the open

drain option of the CANx_TxD output as shown in Figure 21. Thanks to the OR-Wired

Connection, only one transceiver is required. In this case the design of the application must

take in account the wire length and the noise environment.

Figure 21.

Connection to single CAN bus via common CAN transceivers

CAN1

CAN_H

CAN_L

CAN bus

CAN2

XMISC.CANPAR = 0

CAN

Transceiver

P4.4

P4.7

P4.5

P4.6

OD = Open Drain Output

+5 V

CAN

CAN_H

CAN_L

CAN bus

2.7kW

Transceiver

XMISC.CANPAR = 0

CAN1

CAN2

P4.4

P4.7

P4.5

P4.6

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