Ic Description; Vct383Xa Tv Signal Processor - Teletext Decoder With Embedded 8 Bit - Controller; Block Diagram Off The Vct; Tv-Signal Processor - Daewoo CHASSIS : SC-150 Model : DSC-3220E Service Manual

4 - IC description

4-1 VCT383XA TV signal processor - Teletext decoder with embedded 8 bit - Controller.

4-1-1- Block diagram of the VCT
4
VIN
Video
3
CIN
Front-end
VOUT
TPU
24 kB ROM
3 kB
OSD RAM
16 kB
Text
RAM

4-1-2- TV-signal Processor

Four composite video inputs, two S-VHS inputs
Analogue YC r C b input
Composite video monitor
Multistandard colour decoder ( 1 crystal )
Multistandard sync decoder
Black-line detector
Adaptive 2H comb filter Y/C separator
VCT 38xx
Comb Color
Filter Decoder
8
BE
DMA CPU
RDY
1 kB
CPU RAM
96 kB
CPU ROM
31
ADB, DB, CB
2 2
Display
Processor
Panorama
Scaler
Pict. Improv
2
I C
MSync
Color, Prio
VSync
2
I C Master
8-bit PWM
14-bit PWM
15:1 Mux
10-bit ACD
2 Timer
2 CapCom
Watchdog
24 IO Ports
12
-18-

Service manual SC-150

2
3
RGBOUT
Video
SVM
Back-end
4
RGBIN
VSUPAB
GNDAB
2
AOUT
3
Audio
AIN
2
2
I C
RESQ
Reset
Logic
TEST
XTAL1
Clock
Oscillator
XTAL2
CLK20