SH7055S Datasheet, PDF(557/1002 Page) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

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SH7055S Datasheet, PDF (557/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

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Section 16 Controller Area Network (HCAN)

16.1 Overview

The HCAN is a module for controlling a controller area network (CAN) for realtime

communication in vehicular and industrial equipment systems, etc. The SH7055SF has a 2-

channel on-chip HCAN module.

Reference: Bosch CAN Specification Version 2.0 1991, Robert Bosch GmbH

16.1.1 Features

The HCAN has the following features:

â¢ CAN version: Bosch 2.0B active compatible

ï£§ Communication systems:

NRZ (Non-Return to Zero) system (with bit-stuffing function)

Broadcast communication system

ï£§ Transmission path: Bidirectional 2-wire serial communication

ï£§ Communication speed: Max. 1 Mbps (at 40 MHz operation)

ï£§ Data length: 0 to 8 bytes

â¢ Number of channels: 2 (HCAN0, HCAN1)

â¢ Data buffers: 16 per channel (one receive-only buffer and 15 buffers settable for

transmission/reception)

â¢ Data transmission: Choice of two methods:

ï£§ Mailbox (buffer) number order (low-to-high)

ï£§ Message priority (identifier) high-to-low order

â¢ Data reception: Two methods:

ï£§ Message identifier match (transmit/receive-setting buffers)

ï£§ Reception with message identifier masked (receive-only)

â¢ CPU interrupts: Four independent interrupt vectors per channel:

ï£§ Error interrupt

ï£§ Reset processing interrupt

ï£§ Message reception interrupt

ï£§ Message transmission interrupt

â¢ HCAN operating modes: Support for various modes:

ï£§ Hardware reset

ï£§ Software reset

ï£§ Normal status (error-active, error-passive)

Rev.2.0, 07/03, page 519 of 960

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