PRODUCT INFORMATION

Vol.102

Digital Servo DSP with On-Chip RF Amplifier Developed

CD player servo processing and decoding integrated on a single
chip

LC78645E

Overview

The popularity of music has resulted in the widespread use of a wide range of audio media, such as
cassette tape, CD, and MD. Recently, the consumer's options have expanded to include products that
use semiconductor memory as the storage medium.
Still, the CD, with an annual worldwide market of 120 million units, remains the most popular format
and is expected to retain its lead for the near future.

Since the CD player represents a mature market, particular aspects are desired in the components used
in these products. The main desired properties are (1) the ability to provide stable performance for
easy development of end products (In particular, this means reducing both the time and the number of
employees required for end product development.) and (2) a small total parts count to improve relia-
bility, to reduce manufacturing and parts costs and to increase production efficiency.
To respond to these needs, Sanyo has now developed the LC78645E super system-on-chip servo CD
DSP that integrates an RF amplifier on the same chip.

Until now, even though a digital servo CD DSP has been used, CD players have required a separate
bipolar IC to provide the required RF amplifier. Thus the main signal processing for CD playback has,
until now, required a two-chip structure consisting of this bipolar IC and the CD DSP that handles the
servo and digital later signal processing. The LC78645E is a super system-on-chip CD DSP that incor-
porates bipolar IC technology onto the MOS IC itself.

Use of the LC78645E allows both the parts count and the number of manufacturing steps to be
reduced, and to increase end product reliability as a result. Furthermore, servo development support
software can now be used to verify servo characteristics on a personal computer, an operation that had
been extremely time consuming up to now.

Features

· Playback functions

-- Audio CD playback (standard, 2

, and 4

speeds)

SANYO Electric Co., Ltd. Semiconductor Company Overseas Marketing Division

TOKYO OFFICE: Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

SANYO Electric Co., Ltd. Semiconductor Company Overseas Marketing Division

-- Jitter-free playback (VCEC)

-- CAV playback

· RF processing block

-- RF system: AGC, support for CD-R and CD-RW playback, peak hold, bottom hold

-- Error system: Tracking error signal generation (with balance adjustment), focus error signal

generation, CD-RW playback support

-- Track jump counter clock generation, jitter detection, defect (black, mirror) detection

-- APC

· Servo control block

-- All servo systems (tracking, focus, sled, and spindle) are implemented with digital processing.

-- Automatic adjustment functions: focus gain, focus balance, focus offset, tracking gain,

tracking offset, tracking balance

-- Shock detection

-- Interruption detection

· EFM processing block

-- EFM signal synchronization detection, protection, and interpolation

-- EFM signal demodulation

-- Subcode P to W output

-- Subcode Q output

-- Jitter margin: ±13 frames

-- Unscrambling and deinterleaving

-- Error detection and correction (dual errors in both C1 and C2)

-- Interpolation (quadruple interpolation)

-- DOUT output

· Audio processing

-- Digital attenuator

-- Fadeout function

-- Bilingual function

-- 8

oversampling digital filters

-- Digital deemphasis filter

-- 1-bit D/A converter (third-order

noise shaping)

-- Second-order low-pass filter for audio output

-- Supports external supply of DF and D/A converter clocks.

PRODUCT INFORMATION

SANYO Electric Co., Ltd. Semiconductor Company Overseas Marketing Division

PS.83100/102

PRODUCT INFORMATION

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.

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.

Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer's
products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,
the customer should always evaluate and test devices mounted in the customer's products or equipment.

SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.

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Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification"
for the SANYO product that you intend to use.

Information (including circuit diagrams and circuit parameters) herein is for example only; it is not
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