Renesas Introduces Six Microcontrollers with 3-Channel CAN Controller

10/25/2004 - Renesas Technology Europe announced six new M32C/88 group microcontrollers that are its first to incorporate a 3-channel CAN controller. The M32C/88 group is part of the M16C family's M32C/80 series and inherits the M16C features of highly efficient C-language compatibility, high EMS, low EMI, and low power consumption. The devices incorporate a high-performance CPU core together with a comprehensive set of peripheral functions and large capacity, highly reliable flash memory. They offer excellent cost-performance, providing high performance and functionality at a low price, and are designed for use in automotive and industrial applications.

The connection of three CAN systems has previously required two microcontrollers, but can now be handled by a single M32C/88 group device. This is not only ideal for implementing gateway functions in automotive body controllers connected to a number of networks, but also enables system costs to be reduced through the use of fewer parts. M32C/88 group pin arrangements are compatible with those of the current M32C/84 group (with a single CAN channel) and M32C/85 group (with two CAN channels), facilitating an increase of CAN and allowing smooth system expansion. A function is also provided for connecting two CAN channels within the chip as a single channel, and processing transmit/receive message IDs for two channels on a single channel.

The M32C/88 group microcontrollers incorporate highly reliable on-chip flash memory with a maximum of 512 Kbytes for program storage plus 4 Kbytes for data or program storage. The flash memory operates on a single power supply and achieves a fast write time of approximately 7 seconds for 512 Kbytes.

The M32C/80 CPU core has a 32 MHz maximum operating frequency and a 31.2 ns minimum instruction execution time, achieving a processing performance of 32 MIPS. This high performance is improved through such features as 32-bit calculation circuitry and transfer instructions, along with shift instructions implemented by means of a barrel shifter. The M32C/88 group inherits current M16C family instructions and peripheral functions, and also features pin arrangement compatibility with the M32C/80 series, M16C/80 series and M16C/60 series. This enables the easy upgrade of existing systems, providing a major improvement in system processing performance and allowing a significant reduction in user system development time.

In addition to a comprehensive set of peripheral functions including 16-bit timers, a DMAC, and an A/D converter, the M32C/88 group microcontrollers incorporate circuitry supporting HDLC communications used in ISDN, for example, simplifying the development of products equipped with communication functions. The devices have an on-chip power supply step-down circuit allowing operation on a single power supply, and current dissipation is a low 28 mA typical (at 5 V, 32 MHz operation). Still lower power consumption can be achieved by selecting the on-chip oscillator as the CPU operating clock and using this together with wait mode. A watchdog timer is also provided that continues on-chip oscillator counting even if the device fails and the Xin clock stops.

The microcontrollers are available in 100-pin and 144-pin LQFP packages. Sample shipments will begin in November 2004. A variety of emulator systems are available as development tools to suit different user applications, from a starter kit for initial use to the PC7501 emulator for use in full-fledged development.

CAN: Controller Area Network. A network specification for use in vehicles proposed by Robert Bosch GmbH of Germany.

About Renesas Technology Corp.
Renesas Technology Corp. designs and manufactures highly integrated semiconductor system solutions for mobile, automotive and PC and Audio Visual markets. Established on April 1, 2003 as a joint venture between Hitachi, Ltd. (TSE:6501, NYSE:HIT) and Mitsubishi Electric Corporation (TSE:6503) and headquartered in Tokyo, Japan, Renesas Technology is one of the largest semiconductor companies in the world and the number one microcontroller supplier globally. Besides microcontrollers, Renesas Technology offers system-on-chip devices, Smart Card ICs, mixed-signal products, flash memories, SRAMs and more.

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