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DESCRIPTION

The μPC1857A is a sound control IC with I2C bus.

It has functions to control volume, balance, and tone, and a phase shift matrix surround function.

The surround function achieves wide sound expansion using only two front speakers. Three modes can be selected: movie mode that increases the presence of sound with stereo sound input, music mode emphasizing vocal music, and simulated mode that gives expansion and left and right sound depth with monaural sound input.

The μPC1857A can perform all control (mode switching, volume control and so on) using I2C.

FEATURES

? Volume control function : Attenuation adjustable from 0 to ?80 dB in 64 steps

? Balance control function : The difference in attenuation adjustable from 0 to ?80 dB in 64 steps

? Tone (bass, treble) control function : Adjustable in 32 steps from +10 to ?10 dB

? Surround function (gain adjustable) : Three modes (movie, music, and simulated)

? Mute function

? Mixing function

? Output selection function (for two mono channels input)

? All parameters can be controlled via I2C bus.

APPLICATIONS

? TV, PC monitor