SH7052 datasheet(527/919 Pages) RENESAS

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Section 15 Hitachi Controller Area Network (HCAN)

15.1

Overview

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

communication in automotive and industrial equipment systems, etc. The SH7052F/SH7053F/

SH7054F has a 1-channel on-chip HCAN module.

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

15.1.1

Features

The HCAN has the following features:

• CAN version: Bosch 2.0B active compatible

 Communication systems:

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

Broadcast communication system

 Transmission path: Bidirectional 2-wire serial communication

 Communication speed: Max. 1 Mbps (at 40 MHz operation)

 Data length: 0 to 8 bytes

• Number of channels: 1

• Data buffers: 16 (one receive-only buffer and 15 buffers settable for transmission/reception)

• Data transmission: Choice of two methods:

 Mailbox (buffer) number order (low-to-high)

 Message priority (identifier) high-to-low order

• Data reception: Two methods:

 Message identifier match (transmit/receive-setting buffers)

 Reception with message identifier masked (receive-only)

• CPU interrupts: Four independent interrupt vectors:

 Error interrupt

 Reset processing interrupt

 Message reception interrupt

 Message transmission interrupt

• HCAN operating modes: Support for various modes:

 Hardware reset

 Software reset

 Normal status (error-active, error-passive)

SH7052 Datasheet(PDF) 527 Page - Renesas Technology Corp