SAA5281 Ver la hoja de datos (PDF) - Philips Electronics

Número de pieza

componentes Descripción

Fabricante

SAA5281

Integrated Video input processor and Teletext decoder (IVT1.8*)

Philips Electronics 

Philips Semiconductors

Integrated Video input processor and

Teletext decoder (IVT1.8*)

BLOCK DIAGRAM

Preliminary specification

SAA5281

handbook, full pagewidth VDD1 VDD2

1

10

POWER-ON

RESET

BLAN RGBREF

Y

COR

RGB

22 19 20 18 15 16 17

DISPLAY

DRAM

REFRESH

AND

TIMING

ODD/EVEN 21

(or DV)

8K x 8

DRAM

24 TO 18

HAMMING

DECODER

TELETEXT

AQUISITION

AND DECODING

SERIAL-TO

-PARALLEL

CONVERTER

PACKET 26

PROCESSING

ENGINE

VPS

ACQUISITION

AND

DECODING

SAA5281

MEMORY

INTERFACE

I 2 C-BUS

INTERFACE

24

SDA

23

SCL

TIMING

CHAIN

44

LINE 23

DATA SLICER

AND CLOCK

REGENERATOR

TELETEXT

OR

VPS CONTROL

REF

IREF

6

9

ANALOG

REFERENCE

GENERATOR

ANALOG

TO

DIGITAL

CONVERTER

INPUT

CLAMP

AND SYNC

SEPARATOR

5

14

25

VSS1 VSS2

VSS3

8

CVBS

7

BLACK

ANALOG

OUTPUT

BUFFER

DISPLAY CLOCK

PHASE-LOCKED

LOOP

13

11

37

27 MHz

4

CLOCK

GENERATOR

VCR/FFB

POL

CLK O/P

OSCGND

12

36 2

3

STTV/LFB CLK EN

OSCIN

OSCOUT

MBD783

1996 Nov 04

Fig.1 Block diagram; pin numbers for DIP48 (SOT240-1).

3

Share Link: