NXP Semiconductors MPC5746R - Page 45

Example Communication Peripheral connections
MPC5746R Hardware Design Guide, Rev. 1
NXP Semiconductors 45
Figure 29. Typical high-speed CAN circuit using TJA1050
NOTE
Decoupling shown as an example only. TXD/RXD pull-up/pull-down may
be required, depending on device implementation.
The table below as describes the TJA1050 pin and system connections.
Table 24. TJA1050 Pin Definitions and System Connections
Pin Name Direction Full Pin Name Connection Description
1 TXD Input Transmit data MCU CAN TXD CAN transmit data input from the MCU
2 GND Output Ground Ground Ground termination
3 VCC Input – 5 V Voltage supply input (5 V)
4 RXD Output Receive data MCU CAN RXD CAN receive data output to the MCU
5 VREF Output
Reference voltage
output
Not used
Mid-supply output voltage. This is typically
not used in many systems, but can be
used if voltage translation needs to be
done between the CAN transceiver and
the MCU.
6 CANL Input/Output CAN bus low CAN bus connector CAN bus low pin
7 CANH Input/Output CAN bus high CAN bus connector CAN bus high pin
8S
Input Select
Grounded or MCU
GPIO
Select for high-speed mode or silent
mode. Silent mode disables the
transmitter, but keeps the rest of the
device active. This may be used in the
case of an error condition.