lc78605e Sanyo Semiconductor Corporation, lc78605e Datasheet

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lc78605e

Manufacturer Part Number
lc78605e
Description
Compact Disc Player Dsp With Built-in Microcontroller
Manufacturer
Sanyo Semiconductor Corporation
Datasheet

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lc78605e-D-E
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lc78605e-E
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Ordering number : ENN7735
LC78605E
Overview
The LC78605E CMOS IC implements the signal processing, servo control, LCD display, button state acquisition, and
remote controller handling required by compact disc players without requiring a separate microcontroller. It provides
the following basic functions: demodulation of the EFM signal from the optical pickup, deinterleaving, error detection
and correction, 8 oversampling audio filters, D/A converter (with built-in analog low-pass filter), LCD display drivers,
key acquisition (A/D) and control processing, and automatic discrimination and playback of CD-RW discs. Thus the
LC78604E is ideal for implementing low-end CD players that support playback of CD-RW discs.
The LC78604E also provides a radio tuner frequency display function, and allows digital display of the selected
frequency in manual tuning CD radio/cassette players.
Functions
• Implements the CD play/pause, stop, track selection, fast forward/fast rewind, repeat 1/repeat all, program
<Signal-Processing Block>
• The signal-processing block applies slicing at the correct level to the input HF signal, and converts that signal to an
• A reference clock signal and all necessary timings can be generated using an external 16.9344MHz crystal.
• The disc motor speed is controlled by a frame phase difference signal created from the playback clock and the
• Performs frame sync signal detection, protection, and interpolation to assure stable data readout.
• Demodulates the EFM signal and converts the result 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 data, outputs that data to the internal control processing block.
• Buffers the demodulated EFM signal in internal RAM and compensates for up to ±4 frames of jitter due to
• Applies unscrambling and deinterleaving to the demodulated EFM signal in the stipulated order.
• Performs error detection, correction, and flag processing (C1: double, C2: double).
• Sets the C2 flags according to the C1 flags and the C2 check and applies interpolation and previous value hold
• The internal control processing block controls the track jump, focus start, disc motor start/stop, muting on/off, track
setup/play/clear for up to 30 tracks, and shuffle play functions controlled from CD player buttons.
EFM signal. At the same time it generates a PLL clock signal with an average frequency of 4.3218MHz by
comparing the phase with that of the internal VCO.
reference clock.
fluctuations in the disc speed.
processing to the output signal according to the C2 flags. This interpolation circuit implements 2-value
interpolation. A previous value hold operation is applied if the C2 flags indicate errors for over 2 consecutive
samples.
count, and other operations.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft's
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
SANYO Electric Co.,Ltd. Semiconductor Company
CMOS IC
Compact Disc Player DSP with
Built-in Microcontroller
SANYO Semiconductors
DATA SHEET
32504TN (OT) No.7735-1/11

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lc78605e Summary of contents

Page 1

... LC78605E Overview The LC78605E CMOS IC implements the signal processing, servo control, LCD display, button state acquisition, and remote controller handling required by compact disc players without requiring a separate microcontroller. It provides the following basic functions: demodulation of the EFM signal from the optical pickup, deinterleaving, error detection and correction, 8 oversampling audio filters, D/A converter (with built-in analog low-pass filter), LCD display drivers, key acquisition (A/D) and control processing, and automatic discrimination and playback of CD-RW discs ...

Page 2

... Operating frequency range Fam Ffm Crystal oscillator frequency FX16 Crystal oscillator frequency FX32 * Conditions 1: The coupling capacitor must be located as close as possible to the TUNERIN pin. * Conditions 2: Coupling capacitor: 100pF ±20 pF LC78605E D/A converter and built-in analog low-pass filters =0V SS Conditions max V IN OUT ...

Page 3

... Pull-down resistance RDW IPDOH Charge pump output current IPDOL Package Dimensions unit : mm 3159A 17.2 14 0.35 0.8 (1.0) SANYO : QIP64E (14 LC78605E =3.0V to 3.6V Pin name Conditions LRV , DRF, DEFI, HFL, TES, FMAMB, REMOTE, PUIN, CLOSE CDRESB, TUNERSB, EFMIN, ...

Page 4

... The following oscillator elements are recommended : CSTLS16M9X53-B0 (built-in capacitor) (Murata Mfg. Co., Ltd.) CSTCE16M9V53-R0 (built-in capacitor) (Murata Mfg. Co., Ltd.) Oscillator element C C X’tal LC78605E =3.3V Pin name Conditions With a 1kHz, 0dB signal input LCHO, RCHO With the 20kHz low-pass filter (built into the AD725D) used With a 1kHz, – ...

Page 5

... Pin Assignment EFMI 1 DRF 2 DEFI 3 CLK 4 RWB 5 RWC 6 COIN 7 CQCKB 8 FSEQ 9 CLVO 10 HFL 11 JPO 12 TES 13 TOFF 14 TGL 15 DVSS 16 LC78605E DVSS 48 47 PUIN 46 CLOSE 45 REMOTE 44 FMAMB 43 SEG7 42 SEG6 41 SEG5 LC78605E 40 SEG4 39 SEG3 38 SEG2 37 SEG1 36 COM1 35 COM2 34 COM3 COM4 33 Top view No.7735-5/11 ...

Page 6

... Over Sampling RWB Commander TOFF TGL JPO DRF AD1 A/D AD2 AD3 SL+ SL– Port I/F MONI1 MONI2 MONI3 LC78605E Synchronization Detection EFM demodulation C1, C2 Error Detection & Correction Flag Q, CRC Processing Interpolation Mute 1bit DAC Digital Filter CONTROL TUNER Counter CDRESB TUNERESB RAM 2K ...

Page 7

... SEG4 O Segment output (4) 41 SEG5 O Segment output (5) 42 SEG6 O Segment output (6) 43 SEG7 O Segment output (7) LC78605E Pin state when Function CDRESB is low Clock output Low-level output Low-level output High-level output High-level output Low-level output High-impedance High-impedance High-impedance Undefined Low-level output Low-level output ...

Page 8

... AVDD — Analog system power supply 64 SLCO AO Slice level control output LC78605E Function External VCO control phase comparator output PDO output current adjustment resistor connection VCO frequency range adjustment An external resistor must be connected between this pin and AVDD. Pin state when ...

Page 9

... CLVO 11 HFL 12 JPO 13 TES 14 TOFF 15 TGL 16 DVSS GND To Driver-LSI (LA6548) LC78605E To Function 48 DVSS 47 PUIN 46 CLOSE 45 REMOTE 44 FMAMB 43 SEG7 42 SEG6 41 LC78605E SEG5 40 SEG4 39 SEG3 38 SEG2 37 SEG1 36 COM1 35 COM2 34 COM3 33 COM4 Audio GND Audio VDD TUNER To Mechanism To LCD DISPLAY Rch Lch No.7735-9/11 ...

Page 10

... In the servo systems, the same handling is required for the V V and ground lines. The driver ground lines must be especially wide and located under the device to provide a CC heat dissipating effect. LC78605E /V levels. Level shifters must be inserted to prevent destruction of the OL OH ...

Page 11

... SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of March, 2004. Specifications and information herein are subject to change without notice. LC78605E PS No.7735-11/11 ...

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