The global well-known semiconductor manufacturer ROHM has developed a mechanism that can play all common audio sources and control and manage peripheral components and input and output interfaces for various audio devices from traditional recorders, CD stereos to the latest Bluetooth speakers, USB-DAC, etc. (It can be called the brain of audio applications) Audio SoC * 2 "BM94803AEKU" supporting high resolution * 1 integrated in one chip.
"BM94803AEKU" is a combination of the circuit technology and software technology advantages of the ROHM Group's ASIC (specific application-specific IC), microcontroller and various media decoders accumulated over the years. It is equipped with SDRAM on the optimized design of the processor chip and integrated Encapsulated products. The media decoder not only widely supports a variety of audio sources, but also uses ROHM's accumulated technical experience for more than 20 years to achieve playback stability (smooth playback of scratched CDs and playback of non-standard USB), and the miniaturization of SDRAM.
In addition, with the introduction of this SoC, it also introduced the industry's first audio reference design that supports high resolution. The reference design is centered on the Audio SoC and consists of ROHM's amplifiers, CD drives, etc. to maximize the performance of audio equipment and peripheral applications. Not only that, but also provides special software to help customers quickly develop audio equipment that can play many sound sources stably, ensuring the time it takes to produce sound effects.
The Audio SoC "BM94803AEKU" has been temporarily put into mass production with a monthly output of 30,000 units in January 2017 (sample price 4,000 yen / piece: excluding tax), and a reference design has also been launched (reference price 70 ， 000 yen / unit: not including tax).
In the future, ROHM will continue to expand the lineup of products that support high resolution to meet modern high-quality sound requirements.
<Background>In recent years, not only high-resolution audio sources, but also various audio devices have increasingly demanded to faithfully reproduce the information volume of all audio sources (media, music files).
To support all audio sources, not only multiple media decoders such as CD, USB and Bluetooth including peripheral components are required, but also the software for running these devices is becoming more and more complex, so there is a problem that development takes time.
ROHM faces the audio field. Following general-purpose ICs such as operational amplifiers, it has successively developed audio-related ICs such as sound processors, speaker amplifiers, and media decoders. The development of the Audio SoC equivalent to the brain and the provision of reference designs are very helpful to improve the overall sound quality of the sound system and greatly shorten the development cycle.
<New product features>
Supports from traditional media (CD, USB, SD) to new media (smartphone, Bluetooth), PC (USB-DAC connection), and also supports many music file formats including FLAC and DSD.
2. Smoothly play media cherished by usersThe new product incorporates ROHM's accumulated development experience of more than 20 years in the field of ASICs and media decoders. For example, CDs with scratches on the surface can also be played smoothly without skipping. In addition, it can read non-standard USB storage devices that exist in many emerging countries. ROHM uses the technical know-how accumulated over the years to achieve excellent playback stability and meet user expectations for audio equipment.
3. Have software that strongly supports the development of all audio equipmentProviding optimized design of Audio SoC for audio equipment and dedicated software to maximize its performance (provided as a reference design) can greatly shorten the development cycle required by previous audio equipment manufacturers, help rapid development of audio equipment, and ensure Audio production time.
4. Equipped with CD-DSP and SDRAM to achieve miniaturizationAudio SoC is equipped with CD-DSP (CD decoder for CD) and 16M bit DRAM (manufactured by Lebystone Semiconductor) which need to be installed separately in the past to realize integrated packaging. Therefore, the installation area is smaller, and there is no need to worry about radiated noise between components.
<About audio reference design>
A reference design centered on the new product Audio SoC that supports high resolution and maximizes the performance of audio equipment produced by ROHM.
Not only audio equipment is installed, but also peripheral applications (tuner module, Bluetooth module, and CD drive) are installed, allowing immediate confirmation of the playback operation. The reference design helps to quickly develop audio equipment that supports high resolution.
<Support application example>â—‡ Hi-Fi audio equipment â—‡ High-resolution system combined audio â—‡ Recorder
â—‡ Bluetooth speaker â—‡ USB-DAC
<Term Explanation>* 1) High-resolution sound source
The sampling frequency of music for general music CD playback is 44.1kHz, and the number of quantization bits is 16bit, while the sampling frequency of high-resolution sound sources is more than 96kHz, and the quantization bit number is more than 24bit. That is, the amount of information of a high-resolution sound source is much more than that of an ordinary music CD, so high sound quality can be achieved.
* 2) SoC (System on Chip)
Generally refers to the IC that integrates the functions required for system operation. This article represents a series of functions such as extracting and outputting audio signals from a sound source.
<About authorization and trademark>※ Introducing products that support iPod / iPhone / iPad requires authorization for Made for iPod / iPhone / iPad.
iPod and iPhone are trademarks of Apple Inc. registered in the United States and other countries. iPad is also a trademark of Apple Inc.
※ SD is a registered trademark of SD Association.
※ Windows Media and Windows are registered trademarks of Microsoft Corporation in the United States and other countries.
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