Renesas microcontroller suits automotive systems

Renesas Technology Europe has announced the SH72546R SuperH*1 microcontroller designed for use in automotive engine and transmission control systems.

The device combines high-speed operation of up to 200MHz with flash memory capacity of 3.7MB.

The SH72546R is the third in Renesas Technology's line of high-performance control MCUs fabricated using a 90nm process node to integrate large-capacity flash memory.

It is designed for powertrain control applications, which demand a more fine-grained and agile response to achieve environmental goals such as reduced exhaust emissions and improved fuel economy.

It retains the 200MHz high-speed operation of the earlier SH72544R, while expanding the on-chip flash memory size by 50 per cent to 3.75MB, enabling storage of even larger programs.

The SH72546R is fully compatible with the SH72544R's functions, package and pin assignment.

This allows system hardware and software design resources developed for the earlier device to be adapted to the SH72546R.

The SH72546R incorporates the same SH-2A core as the earlier devices in the series.

This core, having a superscalar structure and Harvard architecture, achieves 400 MIPS at 200MHz operation, enabling it to achieve sophisticated real-time control involving more complex operation processing demanded by engine or transmission control applications.

It offers low power consumption across the complete temperature range even when operating at 200MHz.

The device is able to operate in ambient temperatures up to 125C.

The SH72546R also includes 128KB of flash memory with functions essentially equivalent to those of Eeprom for data storage, making external memory unnecessary.

In addition to using Renesas' technologies to increase the speed of the flash memory in this product, the SH72546R also features a low-power cache system to optimise the use of flash memory.

These technologies minimise power consumption and boost performance to make it essentially equal to single-cycle access at 200MHz.

The SH72546R includes a range of peripheral functions.

In addition to a multifunction timer (ATU-III: Advanced Timer Unit III), which can be used for engine and transmission control, the device also features a high-speed 12-bit A/D converter, CAN*2 interface and high-speed serial interface functions.

The SH72546R is fully compatible with the earlier SH72546RFCC, which was designed for program development and includes large-capacity emulation RAM*3 for efficient debugging.

Customers can transfer systems developed using the SH72546RFCC to the SH72546R.

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