RM0345 datasheet(20/38 Pages) STMICROELECTRONICS

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CAN interface

RM0345

20/38

Doc ID 024080 Rev 3

CAN interface

The

calibration board is equipped with one ST L9616 High-Speed Transceiver. It provides

the Controller Area Network (CAN) communication interface through the SPC563M64xx

CAN interface for calibration via CAN. This serial communication can reach speeds up to

1Mbps.

Figure 12.

CAN schematic diagram

Two jumpers (J12 and J13), allow to select between the two FlexCAN interfaces of the

SPC563M64xx mcu.

The CAN channel is terminated with a 120 ohms resistor. Moreover, a protection circuitry

has been designed to protect the CAN transceiver in high-speed and fault tolerant networks

from ESD and other harmful transient voltage events (see Figure 12).

The L9616 CAN transceiver has an Adjustable Slope Control (ASC) feature that sets the

slope speed using its ASC pin. This feature select the modes of operation:

●

low speed (CAN baud rate up to 250kBaud)

●

high speed (CAN baud rate from 250kBaud to 1000kBaud)

This pin can be put to high or to low by the cut trace options J6, J17 & J7 as described in

Table 9.

Table 8.

J12, J13 FlexCAN interface selection

FlexCAN interface

J12 pin configuration

TX select

J13 pin configuration

RX select

FlexCAN A

2 - 3

FlexCAN C

2 - 1

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