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On-chip flash memory MCU operates at highest speed

Posted: 10 Jul 2008     Print Version  Bookmark and Share

Keywords:MCU  high-speed operation  on-chip flash memory  software development 


Renesas Technology Corp. releases the SH72544R SuperH Family MCU designed for control of automotive engine and transmission systems. This MCU features high-speed operation of up to 200MHz and a high-speed, large-capacity 2.5MB on-chip flash memory.

In August 2007 Renesas announced the SH72546RFCC software development MCU as the industry's first on-chip flash memory MCU fabricated using a 90nm process. This device, designed for power train control, operated at 200MHz, and featured a high-speed, large-capacity 3.75MB on-chip flash memory.

The SH72544R is the first mass-production version based on the SH72546RFCC and is fully compatible with the SH72546RFCC's functions, package, and pin assignment. This means that users can directly use the system hardware, programs, and other design assets they have developed using the SH72546RFCC. Application of such assets to this product will be quick and seamless.

Furthermore, the SH72544R operates at 200MHz, the highest speed for on-chip flash memory microcontrollers, and can achieve operation at high-temperature environments of ambient temperatures up to 125°C, desirable for automotive applications. In addition, the 2.5MB large-capacity on-chip flash memory allows it to implement leading-edge high-precision control.

In recent years, emission regulations have become increasingly strict to protect the environment, which means improved fuel efficiency is strongly desired as well. As a result, even higher precision control is desired in power train control equipment used in engine, transmission control systems. Associated with this requirement, there are increasing needs for further improvements in processing performance and support for large size programs for fine-grained control, that is, larger memory capacities for the on-chip program storage.

Renesas has been mass producing the SH7050 series products for the power train control market. These devices have been widely used and have earned a large share of this market. To support the increasing needs for even higher performance in the future, however, Renesas decided to deploy a line of products that are based on the SH-2A CPU core, which provides superb real-time control performance, that provide both high-speed operation and a large-capacity on-chip flash memory made possible by fabrication in a 90 nm process. Accordingly, Renesas announced the SH72546RFCC, which is designed for software development, in August 2007, and is now releasing the SH72544R as the first mass production product based on the SH72546RFCC.

The SH72544R incorporates the high-performance SH-2A CPU core, which achieves 400 MIPS at 200MHz and is optimal for real-time processing.

The device also includes a 128KB EEPROM function area that allows data to be rewritten during microcontroller operation. Since this obviates the need for the external EEPROMs that were previously used, it can contribute to reduced costs in application systems.

Furthermore, the SH72544R includes a rich set of peripheral functions that are appropriate for engine control applications and are fully compatible with the SH72546RFCC peripheral functions. The ATU-III provides functions that are effective for use in both engine and transmission control. In particular, it includes 32bit input capture/output compare, one-shot pulse output, PWM output, and other functions, and can provide up to 106 pulse outputs. The 12bit ADC features 37 input channels and can rapidly convert analogue data from a number of sensors. Furthermore, the SH72544R provides an extensive set of communication interfaces, including an automotive network CAN interface and high-speed serial interfaces that can connect to external devices. These peripheral functions and interfaces can reduce component costs.

The SH72544R is provided in a 272-pin P-BGA package (21 x 21 mm) and is fully pin compatible with the SH72546RFCC. The E10A-USB compact on-chip debugging emulator, which is powered from the USB bus and thus requires no external power supply, can be used as a development tool. Sample shipment begins this month in Japan.

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