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11. IC DESCRIPTION
1. Introduction
The VCT 38xxA/B is an IC family of high-quality single-
chip TV processors. Modular design and a submicron
technology allow the economic integration of features
in all classes of TV sets. The VCT 38xxA/B family is
based on functional blocks contained and approved in
existing products like VDP 3120B, TPU 3050S, and
CCZ 3005K.
Each member of the family contains the entire
video,display, and deflection processing for 4:3 and
16:9 50/ 60-Hz TV sets. The integrated microcontroller
is sup-ported by a powerful OSD generator with
integrated teletext acquisition which can be upgraded
with on-chip page memory. With volume control and
audio input select the basic audio features for mono TV
sets are integrated. An overview of the VCT 38xxA/B
sin-gle-chip TV processor family is given in Fig. 1–1 on
page 7.
2. Chip Architecture
4
VIN
Video
3
CIN
Front-end
VOUT
TPU
24 kB ROM
3 kB
OSD RAM
16 kB
Text
RAM
VCT 38xxA/B
Comb
Color
Filter
Decoder
8
BE
DMA
CPU
RDY
1 kB
CPU RAM
96 kB
CPU ROM
31
ADB, DB, CB
-30-
The VCT 38xxA/B family offers a rich feature set, cov-
ering the whole range of state-of-the-art 50/60-Hz TV
applications.
In comparison to the VCT 38xxA the VCT 38xxB offers
the following features:
– one additional composite video input
– analog luma/chroma adder for video output
– closed caption module
– additional 12k character ROM
2
2
Display
Panorama
Processor
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
VCT 38xxA/B
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
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