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UM2248
9.14
CAN
The STM32L4R9I-EVAL board supports one CAN2.0A/B channel compliant with CAN
specification. The CN22 DB9 male connector is available as CAN interface.
A 3.3 V CAN transceiver is fitted between the CN22 connector and the CAN controller port
of STM32L4R9AII6.
The JP14 jumper selects one of high-speed, standby and slope control modes of the CAN
transceiver. The JP13 jumper allows to integrate a CAN termination resistor. The JP12 is used
to connected CAN transceiver avoiding unknown signals from CAN transceiver.
Jumper
JP14
JP13
JP12
9.14.1
Limitations
CAN operation is exclusive with Audio codex and MC operation.
9.14.2
Operating voltage
The supply voltage for STM32L4R9I-EVAL CAN operation must be within the range from
3.0 V to 3.6 V.
Table 8. CAN related jumpers
Setting
Default setting.
CAN transceiver operates in high-speed mode.
CAN transceiver is in standby mode.
Default setting.
Termination resistor fitted on CAN physical link.
No termination resistor on CAN physical link.
Default setting.
CAN_TX is not used for CAN transceiver.
CAN_TX is used from STM32L4R9AII6 termina.l
DocID030791 Rev 2
Hardware layout and configuration
Configuration
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