Product category:
Analogue and Mixed Signal ICs
News Release from: Rohm Electronics | Subject: BU8709KN
Edited by the Electronicstalk Editorial
Team on 29 December 2003
Cellphone melody chip sounds a good vibe
A new stereo melody sound source IC for cellphones combines simultaneous generation of up to 64 polyphonic tones with LED and vibration control that can be synchronised with the sound output.
A new stereo melody sound source IC for mobile phones combines simultaneous generation of up to 64 polyphonic tones with LED and vibration control functions that can be synchronised with the sound output Rohm's BU8709KN offers a tone palette of 222 sounds made up of 128 polyphonic tones, 47 drum set sounds, 15 electric drum set sounds, and 32 effect sounds
This article was originally published on Electronicstalk on 29 May 2008 at 8.00am (UK)
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A high sampling rate of 44.1kHz ensures very high quality sound output, while the combination of features provides designers with a single IC solution for ring tone, voice, music, gaming and all other sound output.
The BU8709KN features a built-in single channel ADPCM encoder and two ADPCM decoders, allowing a wide range of sounds and melodies to be mixed.
A built-in graphic equaliser function has one channel for bass sounds and two channels for midrange tones, and an integrated 3D sound function offers 15 different types of reverb functionality.
A stereo DAC and a second-order lowpass filter (LPF) are also incorporated into the device.
Providing both stereo and mono operating modes, the BU8709KN will play up to four songs simultaneously and supports real-time modification of tempo, key and volume.
In addition to the standard sounds, the IC also allows users to create customised sounds.
The new IC can be controlled via a serial or parallel interface, with the ADPCM and integrated FIFO functions minimising the load on the host CPU.
Standard format or IIS format digital outputs are supported.
A standby mode and a function that reduces power based on the number of tones ensures low-power operation and extended phone battery life.
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