Renesas' SH7780 Microprocessor Incorporates SH-4A CPU Core and PCI Bus Controller for High Performance Multimedia System

Aug 12, 2004

Renesas Technology America, Inc. today announced the SH7780, a microprocessor incorporating the high end SuperH(TM) SH-4A CPU core and a PCI (peripheral component interconnect) bus controller (PCIC). The device features a dedicated 3-bus architecture and delivers 720 MIPS (million instructions per second) and 2.8 GFLOPS (giga-flops) 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 (advanced technology attachment packet interface) and PCMCIA. These are connected via an internal SuperHyway(TM) 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.

The SH7780 incorporates an on-chip 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 utilize existing programs and helps reduce system development time.

Readers can find additional product and contact information on the Renesas Technology Web site at www .renesas.com.

Explore further: Music site SoundCloud to start paying artists

add to favorites email to friend print save as pdf

Related Stories

US clears $2.3 bln Lenovo deal for IBM unit

11 hours ago

IBM said Friday that US authorities had cleared a $2.3 billion deal allowing China-based Lenovo to take over its server unit after a national security review.

Hitchhiking robot charms its way across Canada

11 hours ago

He has dipped his boots in Lake Superior, crashed a wedding and attended an Aboriginal powwow. A talking, bucket-bodied robot has enthralled Canadians since it departed from Halifax last month on a hitchhiking ...

Attack Ebola on a nanoscale

14 hours ago

(Phys.org) —The Ebola virus outbreak in West Africa has claimed more than 900 lives since February and has infected thousands more. Countries such as Nigeria and Liberia have declared health emergencies, ...

Phone snooping via gyroscope to be detailed at Usenix

15 hours ago

Put aside fears of phone microphones and cameras doing eavesdropping mischief for a moment, because there is another sensor that has been flagged. Researchers from Stanford and defense research group at Rafael ...

Recommended for you

Google to help boost Greece's tourism industry

51 minutes ago

Internet giant Google will offer management courses to 3,000 tourism businesses on the island of Crete as part of an initiative to promote the sector in Greece, industry union Sete said on Thursday.

Enabling a new future for cloud computing

1 hour ago

The National Science Foundation (NSF) today announced two $10 million projects to create cloud computing testbeds—to be called "Chameleon" and "CloudLab"—that will enable the academic research community ...

Hitchhiking robot reaches journey's end in Canada

5 hours ago

A chatty robot with an LED-lit smiley face sent hitchhiking across Canada this summer as part of a social experiment reached its final destination Thursday after several thousand kilometers on the road.

Microsoft to unveil new Windows software

5 hours ago

A news report out Thursday indicated that Microsoft is poised to give the world a glimpse at a new-generation computer operating system that will succeed Windows 8.

Music site SoundCloud to start paying artists

7 hours ago

SoundCloud said Thursday that it will start paying artists and record companies whose music is played on the popular streaming site, a move that will bring it in line with competitors such as YouTube and Spotify.

User comments : 0