For Audio Equipment
MN662740RE
Signal Processing LSI for CD Players
Overview
The MN662740RE is a CD signal processing LSI that,
on a single chip, combines an optics servo for the CD
player (focus, tracking, and traverse servos), digital signal
processing (EFM demodulation and error correction),
digital servo processing for the spindle motor, digital
filter, and D/A converter, so thus covers all signal
processing functions from the head's RF amplifier onward.
(Spindle motor servo)
CLV digital servo
(Audio circuits)
Digital filter using 8-fold oversampling
Built-in D/A converter (1-bit D/A converter)
Built-in differential operational amplifier (2nd order
low pass filter)
(Other)
Built-in playback pitch control function (±13%)
Guaranteed operation for double-speed playback
except for D/A converter output and 4 f
s
mode serial
output
Operating voltage 3.0 to 5.5V
Features
(Optics servo)
Focus, tracking, and traverse servos
Automatic adjustment functions for FO/TR gain,
FO/TR offset, and FO/TR balance
Built-in D/A converter for drive voltage output
Built-in dropout countermeasures
Anti-shock functions
Built-in track cross counter
Support for both linear motor and screw-based traverse
mechanisms
Support for 3- and 1-beam systems
(Digital signal processing)
Built-in DSL and PLL
Frame synchronization detection, holding, and insertion
Subcode data processing
Q data CRC check
Built-in Q data register
CIRC error detection and correction
C1 decoder: duplex error correction
C2 decoder: triplex error correction
Built-in 16-K bits of RAM for de-interleaving
Audio data interpolation
Four-sample average, hold of previous values
Soft muting
Digital attenuation (256 levels)
Software attenuation (256 levels)
Audio data peak level detection function
Auto cue detection function
Digital audio interface (EIAJ format)
Audio data serial interface for input and output
Applications
CD Players
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