Renesas Technology America, Inc. has released four SH7261 series high-performance 32-bit microcontrollers (MCUs) for embedded audio designs for the auto and home that have audio data playback functions compatible with various compression supporting music recording in compressed form on a disk drive.
Designed to replace both traditional MCUs as well as DSPs previously required for digital audio recording, the new devices are designed accommodate middleware for various audio formats (MP3, WMA, AAC (Advanced Audio Coding), etc.).
Capable of performance as high as 192 MIPs at 80 MHz, allowing video codec functions to be implemented in software, all four SH7261 series devices are based on the company’s new superscalar SH2A-FPU CPU core with a built-in floating point unit (FPU), designed to execute fast arithmetic operations as well as real time control.
Capable of two instructions per clock cycle, the architecture more than doubles performance at a given operating frequency. For example, at 80MHz, the device
achieves 192 million instructions per second (MIPS), 160 mega floating point operations per second (MFLOPS) and at 120MHz, it achieves 288 MIPS, 240 MFLOPS.
Key on-chip peripheral functions are a CD-ROM decoder that enables CD-ROM playback functions to be implemented simply by adding inexpensive external parts, and a dual-channel serial sound interface (SSI) that handles digital audio data input and output.
Two SH72611 models provide a 2-channel CAN controller, while two SH72612 models provide an IEBus(TM) controller. All incorporate a variety of other functions important in embedded real time control, including a multifunction timer unit (MTU2-type), 10-bit A/D converter, 8-bit D/A converter, and serial communication interface with 16-stage first-in-first-out (FIFO).
To aid system design, the SH7261 devices have on-chip debugging functions, so real-time debugging can be carried out at the maximum operating frequency. The USB bus-powered E10A-USB debugging tool, which doesn't require an external power supply, is available for debugging tasks that require emulation, as is the High-performance Embedded Workshop, which implements a comprehensive integrated software development environment.
In development is a higher frequency multicore SH7261 version with a 200 MHz operating frequency, with additional peripheral functions added for consumer audio processing such as provision of CD servo control functions and a USB interface.
Available in September, pricing ranges from $14.20 to $16.20 each in sample unit quantities for devices ranging in performance from 80 to 120 MHz.
Renesas Technology America, Inc.
San Jose, Ca.