LC78630中文資料三洋數(shù)據(jù)手冊(cè)PDF規(guī)格書(shū)

Overview

The LC78630E is a CD-DA signal-processing LSI for use in video CD player systems. The LC78630E incorporates signal-processing circuits for demodulating and deinterleaving the EFM signal from the optical pickup, error detection and correction, and digital filtering. It also includes a 1-bit D/A converter and executes commands sent from a system control microprocessor.

Features

? Built-in PLL for EFM signal synchronization (a hybrid analog-digital PLL that supports 4× playback)

? Built-in PLL for variable pitch playback (±13)

? 18KB RAM on chip

? Error detection and correction (corrects two errors in C1 and four errors in C2)

? Frame jitter margin: ±8 frames

? Frame synchronization signal detection, protection, and insertion

? Dual interpolation adopted in the interpolation circuit.

? EFM data demodulation

? Subcode demodulation

? Zero-cross muting adopted

? Servo command interface

? 2fs digital filter

? Digital de-emphasis

? Built-in independent left- and right-channel digital attenuators (239 attenuation steps)

? Left/right swap function

? Built-in 1-bit D/A converter (third-order ?∑ noise shaper, PWM output)

? Built-in digital output circuit

? CLV servo

? Arbitrary track jumping (of up to 255 tracks)

? Variable sled voltage (four levels)

? Built-in oscillator circuit using an external 16.9344 MHz or 33.8688 MHz (for 4× playback) element

? Supply voltage: 3.6 to 5.5 V (4.5 to 5.5 V for 4× playback mode)

? Six extended I/O ports and 2 extended output ports