Renesas Debuts 32-Bit CISC Microcontroller with 768-kByte Flash Memory

5/27/2004 - Renesas Technology Europe has announced the H8SX/1657F 32-bit CISC microcontroller which offers 768 Kbyte on-chip flash memory. The H8SX/1657F is the first general purpose microcontroller to incorporate such large on-chip flash memory. It has been developed for advanced consumer and industrial applications such as PC peripherals, office automation, electronic point-of-sale terminals, and home automation. The device offers excellent value-for-money as it employs Renesas Technology's new flash technology, which helps to reduce the cost adder for embedded flash significantly.

The 768 Kbyte on-chip flash memory can be accessed in just one cycle, enabling storage of large system programs that perform complex control functions, plus high-speed program processing. The provision of flash memory allows lower system cost and more compact systems to be achieved by reducing the number of external parts required, while the ability to rewrite flash memory programs in-system simplifies program modifications and helps shorten system development time.

The H8SX/1657F employs a 0.18-micron CMOS process and is based on the H8SX 32-bit CISC CPU core, which was developed from the H8S 16-bit microcontroller CPU to meet the demand for greater CISC microcontroller power and functionality. The core has 32-bit ALU and internal bus width and offers a high processing performance of 35 MIPS (Dhrystone 1.1) at a 35 MHz maximum operating frequency. It also offers an improvement in ROM code efficiency of approximately 20% compared with the H8S CPU.

The CPU core includes new and enhanced instructions in addition to those of the current H8S family instruction set and has 11 addressing modes. It is upward-compatible with that of the 16-bit microcontrollers H8/300H and H8S family, enabling existing software resources to be used.

The H8SX/1657F is the second phase product to the initial H8SX/1650, with which it is pin-compatible. The new device incorporates a DMAC (Direct Memory Access Controller) in addition to the H8SX/1650 peripheral function set. This offers greater ease of use through such features as an extended repeat area function that performs data transfers repeatedly to the same area and an offset addition function that simplifies setting of transfer source and destination addresses.

The H8SX/1657F uses a 120-pin TQFP package (0.4 mm pin pitch). The device is supported by the E6000H full emulator. An evaluation kit will be released in Q3/04.

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. Renesas Technology Europe is a wholly owned subsidiary of Renesas Technology Corp.

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