Renesas Packs SuperH SH-4A CPU Core and PCI Bus Controller into SH7780

7/29/2004 - Renesas Technology Europe announced the SH7780, a microprocessor incorporating the high end SuperHTM SH-4A CPU core and a PCI bus controller. The device features a dedicated 3-bus architecture and delivers 720 MIPS and 2.8 GFLOPS at 400 MHz, a combination that provides an overall improvement in system performance. For example, the SH7780 supports sophisticated speech recognition and speech synthesis without the need for external DSP. The microprocessor is designed for high-performance multimedia applications such as car navigation systems, game machines and digital home electronics products.

The SH7780 employs three dedicated external busses: a 32-bit Double Data Rate-SDRAM bus at 160MHz (DDR-SDRAM320); a 32-bit bus for PCI bus connections; and a 32-bit local bus at 100MHz for connecting to flash memory, SRAM, ATAPI and PCMCIA. These are connected via an internal SuperHywayTM 64-bit "router type" bus. Furthermore, the three external buses can be operated simultaneously, allowing for efficient data transfer and improved performance. This architecture allows fast boot-up time when transferring data from flash memory to DDR-SDRAM. The result is an overall enhancement in system performance.

In addition, the SH7780 incorporates an on-chip floating point unit (FPU) with a maximum operating speed of 400 MHz. The FPU supports both single-precision and double-precision arithmetic operations and delivers a maximum processing performance of 2.8 GFLOPS when operating in single-precision mode. Hardware support for sine/cosine arithmetic operations also contributes to high-speed rendering of 3-D graphics and DSP calculations.

The four-way set-associative cache memory is divided into two 32 Kbyte areas, one for instructions and one for data. This results in an improved cache hit ratio in comparison with existing products based on the SH-4 core. The SH7780 also offers 16 Kbytes on-chip high-speed RAM for real-time performance, to store exception handling routines, for example.

The SH7780 incorporates an on-chip PCI bus controller (PCIC). This makes it possible to connect the microprocessor to a PCI bus, the type of general purpose bus commonly used in PCs. Moreover, the PCIC supports the PCI Rev. 2.2, allowing connections with LSI devices incorporating a PCI interface and operating at either 66 MHz or 33 MHz. This makes it easy to make connections with graphic chipsets or low-cost external devices such as PC peripherals.

The instruction set from the new SH-4A core is fully SH-4 upward compatible. This makes it possible to utilise existing programs and helps reduce system development time.

Sample shipments of the SH7780 will begin in November 2004.

SuperH is a trademark of Renesas Technology Corp. PCI (Peripheral Component Interconnect) is a bus standard established by the PCI Special Interest Group

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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