SH7047 Datasheet, PDF (447/764 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTMRISC engine Family/SH7000 Series

Section 15 Controller Area Network 2 (HCAN2)
The Controller Area Network 2 (HCAN2) is a module for controlling a controller area network
(CAN) for realtime communication in vehicular and industrial equipment systems, etc. For details
on CAN specification, refer to Bosch CAN Specification Version 2.0 1991, Robert Bosch GmbH.
The block diagram of the HCAN2 is shown in figure 15.1.
15.1 Features
• CAN version: Bosch 2.0B active compatible (conform to ISO-11898 specification)
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
Data length: 0 to 8 bytes
• Number of channels: 1 channel
• Data buffers: 32 buffers (two receive-only buffer and 30 buffers settable for
transmission/reception)
• Data transmission: Can select from two methods
Mailbox (buffer) number order (high-to-low)
Message priority (identifier) reverse-order (high-to-low)
• Data reception: Two methods
Message identifier match (transmit/receive-setting buffers)
Reception with message identifier masked (receive-only)
• Interrupt sources: 14 (allocate to four independent interrupt vectors)
Error interrupt
Reset processing interrupt
Message reception interrupt
Message transmission interrupt
• HCAN2 operating modes
Hardware reset
Software reset
Normal status (error-active, error-passive)
Bus off status
HCAN2 configuration mode
HCAN2 sleep mode
HCAN2 halt mode
Rev. 2.00, 09/04, page 407 of 720