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Service Manual CP-099/FS
4 - IC description
4-1 VCT383XA TV signal processor - Teletext decoder with embedded 8 bit - Controller.
4-1-1- Block diagram of the VCT
3
VIN
Video
4
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
Panorama
Processor
Scaler
Pict.Improv
I
2
C
MSync
Color, Prio
VSync
I
2
C Mmaster
8-bit PWM
14-bit PWM
15:1 Mux
10-bit ADC
2 Timer
2 CapCom
Watchdog
24 IO Ports
12
-15-
2
3
RGBOUT
Video
SVM
Back-end
4
RGBIN
VSUPAB
GNDAB
2
AOUT
Audio
3
AIN
2
2
I
C
RESQ
Reset
Logic
TEST
XTAL1
Clock
Oscillator
XTAL2
CLK20
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