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LC78622NE の電気的特性と機能

LC78622NEのメーカーはSanyo Semicon Deviceです、この部品の機能は「Compact Disc Player DSP」です。


製品の詳細 ( Datasheet PDF )

部品番号 LC78622NE
部品説明 Compact Disc Player DSP
メーカ Sanyo Semicon Device
ロゴ Sanyo Semicon Device ロゴ 




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LC78622NE Datasheet, LC78622NE PDF,ピン配置, 機能
www.DataSheet4U.com
Ordering number : EN6015
CMOS IC
LC78622NE
Compact Disc Player DSP
Overview
The LC78622NE is a CMOS IC that implements the
signal processing and servo control required by compact
disc players. At the same time as providing an EFM PLL
circuit, a 1-bit D/A converter, and an analog low-pass
filter the LC78622NE realizes an optimal cost-
performance tradeoff for low-end players by strictly
limiting functionality to basic signal-processing and servo
system functionality. The LC78622NE signal-processing
system provides demodulation of the EFM signal from the
pickup, de-interleaving, error detection and correction, and
digital filters that can prove useful in reducing the cost of
end products. The LC78622NE servo control system
processes servo commands sent from the control
microprocessor.
The LC78622NE is an improved version of the LC78622E
that adds 8× oversampling digital filters, three general-
purpose output ports (that also have specific shared
functions) and the PCCL pin (pin 34). However, some
handling of general-purpose ports differ from that of the
LC78622E, therefore care must be taken.(Refer to pages
16 and 21).
Functions
• Input signal processing: The LC78622NE takes an HF
signal as input, digitizes (slices) that signal at a precise
level, converts that signal to an EFM signal, and
generates a PLL clock with an average frequency of
4.3218 MHz by comparing the phases of that signal and
an internal VCO.
• Precise reference clock and necessary internal timing
generation using an external 16.9344 MHz crystal
oscillator
• Disk motor speed control using a frame phase difference
signal generated from the playback clock and the
reference clock
• Frame synchronization signal detection, protection and
interpolation to assure stable data readout
• EFM signal demodulation and conversion to 8-bit
symbol data
• Subcode data separation from the EFM demodulated
signal and output of that data to an external
microprocessor
• Subcode Q signal output to a microprocessor over the
serial I/O interface after performing a CRC error check
(LSB first)
• Demodulated EFM signal buffering in internal RAM to
handle up to ±4 frames of disk rotational jitter
• Demodulated EFM signal reordering in the prescribed
order for data unscrambling and de-interleaving
• Error detection, correction, and flag processing (error
correction scheme: dual C1 plus dual C2 correction)
• Sets the C2 flags based on the C1 flags and a C2 check,
and then performs signal interpolation or muting
depending on the C2 flags. The interpolation circuit uses
a dual-interpolation scheme. The previous value is held
if the C2 flags indicate errors two or more times
consecutively.
• Support for command input from a control
microprocessor: commands include track jump, focus
start, disk motor start/stop, muting on/off and track
count (8 bit serial input)
• Built-in digital output circuits.
• Arbitrary track counting to support high-speed data
access
• D/A converter outputs with data continuity improved by
8× oversampling digital filters.
• Built-in third-order ∑∆ D/A converters (An analog low-
pass filter is built in.)
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.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
11999RM (OT) No. 6015-1/31

1 Page





LC78622NE pdf, ピン配列
Pin Assignment
LC78622NE
Specifications
Absolute Maximum Ratings at Ta = 25°C, VSS = 0 V
Parameter
Maximum supply voltage
Input voltage
Output voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VDD max
VIN
VOUT
Pd max
Topr
Tstg
Conditions
Ratings
VSS – 0.3 to VSS + 7.0
VSS – 0.3 to VDD + 0.3
VSS – 0.3 to VDD + 0.3
300
–20 to +75
–40 to +125
Unit
V
V
V
mW
°C
°C
No. 6015-3/31


3Pages


LC78622NE 電子部品, 半導体
LC78622NE
Figure 2 Subcode Q Output
Figure 3 Subcode Output
Figure 4 General-Purpose Port Input Timing
Figure 5 General-Purpose Port Output Timing
No. 6015-6/31

6 Page



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共有リンク

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部品番号部品説明メーカ
LC78622NE

Compact Disc Player DSP

Sanyo Semicon Device
Sanyo Semicon Device


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