參數(shù)資料
型號(hào)： LC78631E
元件分類(lèi)： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQFP80
封裝： QFP-80
文件頁(yè)數(shù)： 1/34頁(yè)
文件大?。?/td> 502K
代理商： LC78631E
Overview
The LC78631E is a compact disc D/A signal-processing
LSI for CD-ROM drives that provides a variable clock
error correction (VCEC) mode. The LC78631E
demodulates the EFM signal from the optical pickup and
performs de-interleaving, error detection, error correction,
digital filtering, and other processing. The LC78631E
includes an on-chip 1-bit D/A converter, and executes
commands sent from a control microprocessor.
Features
VCEC support
Built-in PLL circuit for EFM detection (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)
Supports the bilingual function
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)
Six extended I/O ports and 2 extended output ports
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 (4.75 to 5.5 V for 4
×
playback mode)
Package Dimensions
unit: mm
3174-QFP80E
CMOS LSI
62096HA (OT) No. 5342-1/34
SANYO: QFP80E
[LC78631E]
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
Compact Disk Player DSP
LC78631E
Ordering number : EN 5342
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