Texas Instruments TMS320F2837 D Series

Controller Area Network (CAN)
TMS320F2837xD Microcontroller Workshop - Communications 12 - 23
CAN Bus and Node
CAN Bus
 Two wire differential bus (usually twisted pair)
 Max. bus length depend on transmission rate
 40 meters @ 1 Mbps
CAN
NODE B
CAN
NODE A
CAN
NODE C
CAN_H
CAN_L
120Ω
120Ω
The MCU communicates to the CAN Bus using a transceiver. The CAN bus is a twisted pair wire
and the transmission rate depends on the bus length. If the bus is less than 40 meters the
transmission rate is capable up to 1 Mbit/second.
CAN Node
Wired-AND Bus Connection
RXTX
CAN Controller
(e.g. TMS320F28xxx)
CAN_L
CAN_H
120Ω
120Ω
CAN Transceiver
(e.g. TI SN65HVD23x)