New audio processor with integrated high-efficiency audio codec (ST)

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( ) Introducing a new ARM7TDMIÂ® core and Exclusive FFX (Full Flexible Amplification) digital modulation technology for audio processors. The STA331 audio processor integrates an efficient Class D audio codec, which is extremely flexible and can be used in a variety of audio consumer products such as portable and wireless audio equipment, home theater and audio systems. The new audio processor has been greatly expanded The range of applications for the Sound TerminalTM family of high quality single-chip audio solutions.

Extremely low power consumption, processing speeds up to 75MHz, excellent sound quality, STA331 can be used in both portable and fixed device applications, the same chip can be used in many different products, such as set-top boxes (STB), home audio systems, mini and small stereos System, wireless speakers and headphones. When and When used in conjunction with the digital power amplifier chip STA510F designed for FFX drivers, the STA331 can drive up to 100W of audio power per channel.

Because product differentiation is critical for mid-range audio processing applications, the STA331's analog and digital audio peripherals make it an ideal flexible mid-range audio processing solution. The code is loaded from the external serial flash into the embedded RAM, and then the audio processor fetches the code from RAM. The processor can control all audio parameters and functions through an I2C interface, and if used separately, control parameters and functions through a customizable GPIO interface. In addition, the widely used ARM7TDMI core allows rapid portability of third-party audio code compatible with ARM processors.

The STA331 integrates a stereo ADC (analog-to-digital converter), FFX PWM (Pulse Width Modulation) modulator and a powerful bridge in a single package, as well as multi-standard digital connectivity and a three-way input selector for implementation. Multi-source multiplexing provides the possibility.

To improve the listening experience of users' music and movies, Also developed a complete library of algorithms, including digital audio processing techniques, for example, Exclusive Tones Control tone control, WideSurround surround sound, StereoEnhancer stereo enhancer, smart volume control (MDCR), enhanced listening mode (voice and midnight mode), noise reduction and echo suppression, speaker and speaker audio correction equalizer. If the customer needs it, Audio compression algorithm decoders as well as commonly used third party algorithms are also provided.

The STA331 is now in volume production and is available in a TQFP package and is priced at less than $3.50.

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