LC78601E Datasheet | SANYO

Overview The LC78601E CMOS IC implements pact disc player signal processing, servo control, LCD display, key input acquisition, and remote controller processing without requiring control by a separate microcontroller. The basic functions provided include demodulation of the EFM signal from the optical pickup, deinterleaving, error detection and correction, 8× oversampling digital filters, D/A converter (with built-in analog low-pass filter), LCD driver, remote controller processing, key acquisition, and control processing. Thus this IC can provide excellent cost/performance characteristics when implementing a low-end CD player. Functions - Implements CD play/pause, disc stop, track selection, fast forward, reverse, repeat mode playback of 1 track or the whole disc, programmed play (setup, play, and clear) of up to 16 tracks, and random repeat play under the control of key input or remote controller input. <Signal-Processing Block> - Slices an input high-frequency signal at an accurate level, converts the EFM signal, and generates a clock with an average frequency of 4.3218 MHz using a PLL circuit that performs a phase parison with an internal VCO. - Accurately generates not only the reference clock but also all necessary internal timings using an external 16.9344MHz crystal. - Controls the disc motor speed using a frame difference signal created based on the reproduced clock signal and a reference clock. - Performs detection, protection, and interpolation for the frame synchronizing signal to assure stable data readout. - Demodulates the EFM signal, converting it to 8-bit symbol data. - Separates the subcode data from the EFM signal and outputs that data to the internal control processing block. - After applying a CRC check to the subcode Q signal, outputs that signal to the internal control processing block. - Buffers the demodulated EFM signal data in internal RAM and pensates for ±4 frames of jitter due to disc speed fluctuations. - Performs unscrambling and...