UPD63710 Просмотр технического описания (PDF) - NEC => Renesas Technology

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UPD63710

INDUSTRY’S FIRST SINGLE-CHIP LSI WITH RF AMPLIFIER FOR CD PLAYER

NEC => Renesas Technology 

for CD, signal processor for CD, audio

DAC, and RF amplifier on a single chip

• Supports standard-speed/double-speed

play back

• Employs a digital loop filter for 4-channel

servo control. Because the filter

coefficient is programmable, various filter

characteristics can be realized to accord

with the CD mechanism used (sampling

frequency of digital filter: 176.4 kHz).

• Realizes fully automatic adjustment of

servo system by microcontroller. Offset/

gain/balance for both focusing and

tracking can be automatically controlled

by microcontroller.

• Includes a digital attenuation function that

can set 256 steps independently for L/R

channels as audio output processing.

• CIRC error correction function.

C1: Duplex correction

C2: Quadruplex correction (in CD-ROM

mode)

• Includes a x8 oversampling digital filter

and 4th-order ∆Σ 1-bit D/A converter for

audio.

• Supports both current output and voltage

output pickups

• Supply voltage: 5 V, single power source

• Package: 100-pin plastic LQFP (fine pitch)

(14 mm x 14 mm)

Figure 2 shows the internal block diagram

of the µPD63710.

Features

1. Integration of functions necessary for

compact disc player on single chip

The biggest feature of the µPD63710 is

the incorporation of the industry’s first

CMOS RF amplifier and its peripheral

components. In addition, this LSI integrates

the functions necessary for a compact disc

player, such as digital servo, CD signal

processor, and audio DAC, on a single chip,

contributing to the creation of a small-size

and cost-effective application set.

2. Employment of digital PLL circuit

Because a digital PLL is employed for bit

clock playback, no external component is

necessary for this block. As a result,

fluctuations in characteristics due to

temperature changes and aging can be

suppressed.

3. Flexible setting of filter coefficients

The four-channel servo system employs a

digital loop filter. The coefficients of each

filter can be flexibly set. By this, various

characteristics that match the optimum servo

characteristics of the pickup to be used can

be realized. In addition, offset, gain, and

balance for focusing and tracking can be

automatically adjusted by a microcontroller,

so that the optimum servo characteristics can

always be realized without being affected by

variations of the pickup and disc.

4. CD-TEXT decode function

The µPD63710 has a CD-TEXT decode

function (that also supports Mode2), which

facilitates the creation of a small-size and

high-performance system.

Support Tools

To evaluate and verify the basic functions

of the µPD63710 and to develop the

microcontroller firmware, a µPD63710

evaluation board is available. In addition,

filter simulation software that sets the

coefficient of the internal digital loop filter

of the µPD63710 to the optimum value is

also available.

1. Outline of µPD63710 evaluation board

The µPD63710 evaluation board has a

microcontroller (µPD78P058) for system

control and the firmware already written to

the memory has the following specifications:

• Key input from a key matrix board or key

input from a personal computer via RS-

232C interface can be selected.

• Under the control of a personal computer,

the board can be directly operated with the

servo coefficients calculated with filter

simulation software.

• Because each servo of focus, spindle,

tracking, and sled can be individually

controlled in the servo evaluation mode,

evaluation and verification can be

CD mechanical board

µPD63710 evaluation board

Driver

Post filter

+audio amp.

12V

Battery

Power

supply

µPD63710

LCD-unit

LED

RS-232C

µCOM Socket

DAI

RS-232C

Key

Simulation

software

Key

matrix

µCOM

ICE

Fig. 3 Configuration of µPD63710 Evaluation Board

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