• E-mail
• Print
• Comment
• Font Size
• Digg
• del.icio.us
• Discuss article

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

Posted on: Wednesday, 11 August 2004, 06:00 CDT

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. -0- *T Price and availability 400MHz, 720 MIPS Renesas Part Package Quantity Availability(1) processor Number ---------------------------------------------------------------------- SH7780 R8A77800NBC 449-pin BGA Samples November 2004 (21 x 21mm) ---------------------------------------------------------------------- (1) Please contact Renesas for information regarding the price of this device. *T

Reader contact

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

About Renesas Technology Corp.

Renesas Technology Corp. designs and manufactures highly integrated semiconductor system solutions for mobile, automotive and PC/AV 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 world leading microcontroller supplier globally. Besides microcontrollers, Renesas Technology offers system-on-chip devices, Smart Card ICs, mixed-signal products, flash memories, SRAMs and more.

www.renesas.com

Note:

SuperH is a trademark of Renesas Technology Corp.

PCI (Peripheral Component Interconnect) is a bus standard established by the PCI Special Interest Group.

All companies and products referenced herein are trademarks or registered trademarks of their respective holders. -0- *T Item SH7780 specifications ---------------------------------------------------------------------- Product name R8A77800NBG ---------------------------------------------------------------------- Power supply voltage 1.25 V (internal) / 3.3 V (external), 2.5 V (DDR-SDRAM interface) ---------------------------------------------------------------------- Maximum operating frequency 400 MHz ---------------------------------------------------------------------- Processing performance 720 MIPS, 2.8 GFLOPS (at 400 MHz operation) ---------------------------------------------------------------------- CPU core SH-4A core ---------------------------------------------------------------------- On-chip RAM 16 Kbytes high-speed RAM, 32 Kbytes medium- speed RAM ---------------------------------------------------------------------- Cache memory 4-way set-associative, divided into 32 Kbytes instruction and 32 Kbytes data ---------------------------------------------------------------------- External memory / DDR-SDRAM memory controller: External bus interface 32-bit bus connection to DDR-SDRAM supported. Max. operating frequency: 160 MHz Local bus state controller: Connection to SRAM, burst ROM, etc., supported. Bus width selectable among 8-, 16-, and 32-bit. MPX bus and PCMCIA interface support. Max. operating frequency: 100 MHz PCI bus controller (PCIC): 32-bit bus connection to external PCI device supported. 33 MHz or 66 MHz operation External memory area: 64 Mbytes x 7 (max.) ---------------------------------------------------------------------- Main on-chip peripheral DMAC x 12 channels functions ------------------------------------------- FIFO equipped serial communication interface (SCIF) x 2 channels (max.) ------------------------------------------- Timer x 6 channels ------------------------------------------- Sound interfaces ------------------------------------------- Interrupt controller (INTC) ------------------------------------------- Clock pulse generator (CPG): Internal multiplier PLL ------------------------------------------- On-chip debug function ------------------------------------------- Real-time clock (RTC) ---------------------------------------------------------------------- Power-down modes Module standby function ---------------------------------------------------------------------- Package 449-pin BGA (21 mm x 21 mm) ---------------------------------------------------------------------- *T

More News in this Category