ST10F271Z1 Datasheet, PDF (73/185 Pages) STMicroelectronics – 16-bit MCU with 128 Kbyte Flash memory and 12 Kbyte RAM

ST10F271Z1
CAN modules
Single CAN bus
The single CAN Bus multiple interfaces configuration may be implemented using two CAN
transceivers as shown in Figure 13.
Figure 13. Connection to single CAN bus via separate CAN transceivers
XMISC.CANPAR = 0
CAN1
RX TX
CAN2
RX TX
P4.5
P4.6 P4.4
P4.7
CAN
Transceiver
CAN
Transceiver
CAN_H
CAN_L
CAN bus
The ST10F271Z1 also supports single CAN Bus multiple (dual) interfaces using the open
drain option of the CANx_TxD output as shown in Figure 14. 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 14. Connection to single CAN bus via common CAN transceivers
XMISC.CANPAR = 0
CAN1
CAN2
RX TX
RX TX
+5V
2.7kW
P4.5
P4.6 P4.4
OD
P4.7
OD
CAN_H
CAN_L
CAN
Transceiver
CAN bus
OD = Open Drain output
Multiple CAN bus
The ST10F271Z1 provides two CAN interfaces to support such kind of bus configuration as
shown in Figure 15.
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