Datasheet

15 - CAN MODULES ST10F269
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The ST10F269 also supports single CAN Bus
multiple (dual) interfaces using the open drain
option of the CANx_TxD output as shown in
Figure 48. 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.
Multiple CAN Bus
The ST10F269 provides 2 CAN interfaces to
support such kind of bus configuration as shown
in Figure 49.
Figure 48 : Single CAN Bus, Dual Interfaces,
Single Transceiver
Figure 49 : Connection to Two Different CAN
Buses (e.g. for gateway application)
CAN1
RxD
TxD
CAN2
RxD
TxD
CAN
Transceiver
CAN_H
CAN_H
CAN bus
* Open drain output
+5V
2.7kΩ
*
*
CAN1
RxD
TxD
CAN2
RxD
TxD
CAN
Transceiver
CAN
Transceiver
CAN_H
CAN_H
CAN
CAN
bus 2
bus 1