ST10F276E
CAN modules
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 ST10F276E 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
8-)3#ꢌ#!.0!2 ꢓ ꢉ
#!.ꢀ
#!.ꢁ
28
48
28
48
0ꢇꢌꢃ
0ꢇꢌꢄ 0ꢇꢌꢇ
0ꢇꢌꢊ
#!.
TRANSCEIVER
#!.
TRANSCEIVER
#!.?(
#!.?,
#!. BUS
'!0'2)ꢉꢉꢉꢋꢊ
The ST10F276E 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.
Doc ID 12303 Rev 3
101/235
STMICROELECTRONICS [ ST ]
