San Jose, Calif. Renesas Technology America, Inc. has introduced five SuperH 32-bit microcontrollers that use multi-core technology to achieve the high levels of performance required by many embedded system applications such as consumer products, industrial equipment, and car audio and navigation systems.
The SH7205 and SH7265 devices incorporate two superscalar SH2A-FPU CPU cores and a comprehensive set of on-chip peripherals that includes USB, ATAPI, and image processing engine functions. When the dual-core microcontrollers are operating at their 200-MHz maximum operating frequency, each CPU delivers 480 million instructions per second (MIPS) processing performance in the Dhrystone v1.1 benchmark, and 400 mega floating point number operations per second (MFLOPS) floating-point operation performance,
One of the main benefits of putting multiple CPU cores in a single chip is increased device performance because the CPU cores can execute lines of software code in parallel, said Renesas. The multi-core ICs for embedded systems previously introduced have been aimed primarily at image processing and similar multimedia products with heavy processing loads. In comparison, the SH7205 and SH7265 microcontrollers are general-purpose devices that target a broad span of applications requiring high-speed real-time control and processing performance equivalent to that of a digital signal processor (DSP) chip.
The internal bus system uses a CPU-specific multi-layer structure. A 4-layer configuration provides two layers for CPU use and two for direct memory access controller (DMAC) use. This prevents time from being wasted while the bus is in use by the other CPU, for high-speed real-time processing, said the company.
For greater flexibility, the CPU cores can operate on different operating systems (OSs) or the same one. If one CPU core runs the uITRON OS, while the other runs the uClinux OS, for example, they can execute completely different programs. In addition, the two CPU cores can communicate directly with each other. Each CPU can check the status of the other one, and they can exchange data using memory provided for that purpose.
The SH7205 and SH7265 chips also incorporate a number of peripheral functions that reduce the need for external parts. They include a USB v2.0 high-speed (480-Mbits/s) specification interface, an ATAPI interface, and other various interfaces. The devices feature a 2D graphic engine and a digital video input pin for graphic processing, and WQVA-size (480 x 234-pixel) and QVA-size (320 x 240-pixel) analog RGB output pins for image and video output processing.
Other on-chip functions include a 5-channel multifunction timer unit (MTU) suitable for motor control systems, a 2-channel CAN controller, an 8-channel 10-bit A/D converter, a 2-channel 8-bit D/A converter, a watchdog timer (WDT), and a 14-channel DMAC with 2-dimensional addressing capability for speeding up video applications.
In addition, the SH7265 provides an encoding accelerator for Advanced Audio Coding (AAC) as the audio data compression method. This function can be used for high-speed hardware implementation of music data or similar AAC file creation.
Customers can use currently available compiler, assembler, and linker products as a system development environment for the SH7205 and SH7265 microcontrollers. Renesas is also developing an enhanced version of the E10A-USB emulator with multi-core support and a dual-core OS (uITRON HI7200/MP). This OS has an inter-CPU communication function that eases the implementation of application software and enables current software resources to be used in dual-OS operation, said Renesas.
- The 200-MHz R5S72050W200BG (-20°C to 85°C) is priced at $21.
- The 200-MHz R5S72650P200BG (-40° to 85°C) is priced at $22.
- The 200-MHz R5S72651P200BG (-40° to 85°C) is priced at $23.
- The 200-MHz R5S72652P200BG (-40° to 85°C) is priced at $23.
- The 200-MHz R5S72653P200BG (-40° to 85°C) is priced at $23.
Availability: July 2007
Product information: SuperH series
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Renesas Technology Corp., 1-408-382-7500, www.renesas.com