LC7871NE Просмотр технического описания (PDF) - SANYO -> Panasonic

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LC7871NE

CD Graphics Decoder

SANYO -> Panasonic 

Ordering number : EN4861

CMOS LSI

LC7871E, 7871NE

CD Graphics Decoder

Overview

The LC7871E and LC7871NE are CMOS LSIs that

integrate the signal processing functions required for

compact disk extended graphics (CD-EG) decoding in a

single chip. These products accept the R to W subcode

signals output by CDP-DSP products such as the

LC7860KA, LC7867E, LC7868E, LC7869E, or

LC78681E, and perform de-interleaving, error detection

and correction, graphics instruction processing, and image

processing.

Functions

• The LC7871E and LC7871NE allow a CD-EG decoder

to be constructed with only three chips with the addition

of two external DRAMs (64k × 4). (An RGB encoder is

provided on chip.)

• The LC7871E and LC7871NE perform subcode

synchronization signal interpolation and protection.

They also perform R to W signal de-interleaving and

error detection and correction.

• These products include two crystal oscillator systems

(one for NTSC and one for PAL) which can be easily

switched from a control pin. These products generate the

reference clocks as well as all internal timings for these

two standards by using a 14.31818 MHz crystal for

NTSC and a 17.734476 MHz crystal for PAL.

• Control of image display using CD graphics instructions

and display processing.

• Composite video 8-bit D/A converter output as well as

“define-transparency” 6-bit D/A converter output.

• Support for superimposition

• Microprocessor interface function that supports end-

product upgrades.

• External input pin for channel selection

• Built-in 6-bit RGB D/A converters

• The only difference between the LC7871E and the

LC7871NE is in the BGC to VRAM transfer.

The LC7871E uses a preset memory instruction for

transfer to VRAM, whereas the LC7871NE uses the

load CLUT instruction.

Features

• A CD-G decoder can be constructed from only two

chips, since no controller is required.

• A CD-EG decoder can be constructed with the addition

of two 256-kbit DRAMs since no controller is required.

• Silicon gate CMOS process for low power dissipation

• 5 V single voltage power supply

Package Dimensions

unit: mm

3151-QFP100E

[LC7871E, 7871NE]

SANYO: QIP100E

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

51795TH (OT) No. 4861-1/19

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