MCU brings 32bit core to automotive CAN systems

The H8SX/1527F 32bit CISC microcontroller is the first in a new series of products for in-vehicle control systems based on the H8SX 32bit CPU core.

The H8SX/1527F 32bit CISC microcontroller is the first in a new series of products for in-vehicle control systems based on the H8SX 32bit CPU core.

The device offers on-chip Flash memory and a maximum operating frequency of 40MHz, twice that of previous H8S family 16bit CISC microcontrollers for in-vehicle control systems, providing approximately four times the processing power.

The device includes a controller compatible with the CAN in-vehicle LAN standard which makes it ideal for use in control systems for automotive equipment such as airbags.

The H8SX/1527F is based on a 0.18-micron CMOS process and incorporates an H8SX 32bit CISC CPU core.

This uses a proprietary Renesas Technology architecture based on the company's H8S 16bit microcontroller CPU core but with the ALU and internal bus width extended to 32bit.

This new implementation provides a smooth transition for existing H8S users with the added benefits of high processing power provided by 32bit implementation and a faster operating speed.

The device offers 40MIPS (Dhrystone 1.1) performance at a 40MHz maximum operating frequency.

The device's instruction set is upward compatible with that of the current H8S family and has been extended beyond it with the addition of a wide range of new instructions and addressing mode enhancements.

This enables existing software resources to be used while also allowing programs to be made more compact thanks to an improved ROM code efficiency of approximately 20%.

The H8SX/1527F offers 256Kbyte on-chip Flash memory that allows the user to construct a system with a single chip.

This helps reduce system cost, by reducing the number of external parts required, and debugging and development time through its ability to be rewritten onboard.

The memory can be accessed in one cycle, helping to speed up program execution.

The device features a variety of on-chip peripheral functions for in-vehicle control systems, providing an excellent balance between performance and cost.

These include: a single-channel CAN module compatible with the CAN high-speed, high-reliability in-vehicle LAN standard; multifunction timers, including a timer pulse unit (TPU) 16bit general-purpose timer; a four-channel direct memory access controller with high-speed transfer capability; and a three-channel synchronous serial communication unit that simplifies the connection of sensors and other systems.

The H8SX/1527F comes in a 100-pin QFP and has an ambient operating temperature range of -40 to +85C.

Sample shipments of the device will begin in Q3 2004.

A C compiler, assembler, linkage editor, librarian, simulator and debugger are available as a software development environment, and the E6000H full emulator is available as a hardware development environment.

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