M263 datasheet(326/398 Pages) NUVOTON

326 / 398 page

M261/M262/M263

Mar 25, 2020

Page 326 of 398

Rev 1.02

6.26

Controller Area Network (CAN)

6.26.1

Overview

The C_CAN consists of the CAN Core, Message RAM, Message Handler, Control Registers and

Module Interface. The CAN Core performs communication according to the CAN protocol version 2.0

part A and B. The bit rate can be programmed to values up to 1MBit/s. For the connection to the

physical layer, additional transceiver hardware is required.

For communication on a CAN network, individual Message Objects are configured. The Message

Objects and Identifier Masks for acceptance filtering of received messages are stored in the Message

RAM. All functions concerning the handling of messages are implemented in the Message Handler.

These functions include acceptance filtering, the transfer of messages between the CAN Core and the

Message RAM, and the handling of transmission requests as well as the generation of the module

interrupt.

The register set of the C_CAN can be accessed directly by the software through the module interface.

These registers are used to control/configure the CAN Core and the Message Handler and to access

the Message RAM.

6.26.2

Features



Supports CAN protocol version 2.0 part A and B



Bit rates up to 1 MBit/s



32 Message Objects



Each Message Object has its own identifier mask



Programmable FIFO mode (concatenation of Message Objects)



Maskable interrupt



Disabled Automatic Re-transmission mode for Time Triggered CAN applications



Programmable loop-back mode for self-test operation



16-bit module interfaces to the AMBA APB bus



Supports wake-up function

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