LC83025 Schematic ( PDF Datasheet ) - Sanyo Semicon Device

Teilenummer	LC83025
Beschreibung	Digital Signal Processor for Karaoke Products
Hersteller	Sanyo Semicon Device
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Gesamt 15 Seiten Ordering number : EN4977A CMOS LSI LC83025E Digital Signal Processor for Karaoke Products Overview The LC83025E is a special-purpose karaoke DSP that implements the signal processing required by karaoke systems, including pitch shift, microphone echo, voice muting and simple surround, with only a single 256Kb external DRAM. Since the LC83025E includes built-in A/D and D/A converters, it can also handle analog inputs and outputs in addition to digital inputs and outputs. The LC83025E uses serial transfer of coefficient data from a microcontroller to handle changes in functions and characteristics required for each application. Features • Applications — Pitch shift The LC83025E can shift the music pitch or the microphone pitch by ±15 steps in 1/4 interval steps, or ±1 octave in scale tone steps according to command data sent from the microcontroller. Furthermore, the pitch can be changed up to ±1 octave in arbitrary steps by setting internal coefficients. — Microphone echo The LC83025E implements echo processing for the signal input from the microphone A/D converter. The amount of echo, the delay time and other parameters can be changed by setting coefficients. — Voice mute The LC83025E implements processing that removes monaural signal components included in the music signal. This allows CDs with vocals to be used as karaoke CDs. Command data is used to turn the voice mute function on or off. — Simple surround The LC83025E implements a simple surround function by adding delayed components to the music signal. The LC83025E includes six sets of simple surround coefficients as built-in preset data. These values can be switched by sending command data. Applications can implement their own original surround effects by setting the coefficients. However, the algorithm itself is fixed. — Flexible input mixing The LC83025E supports hybrid mixing of digital and analog left and right channel song inputs, and thus can handle a wide range of disk processing configurations. • Audio inputs and outputs — Inputs: Digital - One system (stereo) A/D converter - Three channels — Outputs: Digital - One system (stereo) D/A converter - Two channels — A/D converter Second order ∆∑ modulation - Three channels — D/A converter 4× oversampling digital filters plus second order noise shaper plus 5-bit PWM system - Two channels • Master clock: 768 fs • External memory: Up to two 256K (64K × 4-bit) DRAMs can be used • Microcontroller input: Synchronous 8-bit serial data • Supply voltage: 5 V single-voltage • Package: QFP80E Package Dimensions unit: mm 3174-QFP80E [LC83025E] SANYO: QFP80E SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN 62896HA (OT)/63095HA (OT) No. 4977-1/15 Pin Circuits Specification TTL output CMOS intermediate current output Analog output Schmitt input Low Schmitt input Normal input Input with built-in pull-up resistor Input with built-in pull-down resistor CMOS intermediate current output Low Schmitt input N-channel open drain intermediate current output Normal input Analog input LC83025E Circuit Pins ASO, LRCKO, BCKO, RAS, CAS, DREAD, DWRT, FS384O, A0 to A8 P3, P4, SIAK, TEST6 DAOL, DAOR, ADL2, ADL3, ADM2, ADM3, ADR2, ADR3 SI, SICK, SIRQ, SRDY, (OSC1) FS384I, BCKI, ASI, LRCKI TEST1 to TEST5 RES SELC, SAIF, SAOF D0 to D7 P0 to P2 ADL1, ADR1, ADM1 No. 4977-6/15 6 Page LC83025E Figure 10 Sample D/A Converter External Circuit No. 4977-12/15 12 Page
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Besondere Datenblatt

Teilenummer	Beschreibung	Hersteller
LC83025	Digital Signal Processor for Karaoke Products	Sanyo Semicon Device
LC83025E	Digital Signal Processor for Karaoke Products	Sanyo Semicon Device
LC83026E	Digital Signal Processor for Karaoke Systems	Sanyo Semicon Device

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