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Circuit Descriptions, List of Abbreviations, and IC Data Sheets
9.8
IC Data Sheets
In this section, the internal block diagrams and pin layouts of
ICs that are drawn as "black boxes" in the electrical diagrams
(with the exception of the "memory" and "logic" ICs) are given.
9.8.1
Diagram AV7, TEA6415 (IC7710)
TEA6415C
BLOCK DIAGRAM
GENERAL DESCRIPTION
The main functionof the IC is to switch 8 video input
sources on 6 outputs.
Each output can be switched on only one of each
input. On each input an alignment of the lowest
level of the signal is made (bottom of synch. top for
CVBS or black level for RGB signals).
Each nominal gain between any input and output
is 6.5dB. For D2MAC or Chroma signal the align-
ment is switched off by forcing, with an external
resistor bridge, 5 V
be used as a normal input or as a MAC or Chroma
2/10
P ERI
P ERI
TV1
TV2
18
1 7
CVBS
1
(MAC/DEC)
CVBS
3
(P ERI P LUG1)
CVBS
5
(AM TUNER)
MAC S IGNAL
6
(AMTUNER)
CVBS
8
(P ERI P LUG2)
CVBS
10
(FM TUNER)
MAC S IGNAL
11
(FM TUNER)
SYNCHRO
20
(TTX/BTX)
2
DATA
on the input. Each input can
DC
Figure 9-16 TEA6415 Internal Block Diagram (Switch)
TTX
LUMA
PIP
MAC
CHROMA
DEC.
POWER
GND
16
15
1 4
13
12
BUS
DECODER
7
4
9
19
P ROG
CLOCK
V
GND
CC
input (with external resistor bridge). All the switch-
ing possibilities are changed through the BUS.
Driving 75Ω load needs an external transistor.
It is possible to have the same input connected to
several outputs.
The starting configuration upon power on (power
supply : 0 to 10V) is undetermined.
In this case, 6 words of 16 bits are necessary to
determine one configuration. In other case, 1 word
of 16 bits is necessary to determine one configura-
tion.
F21RE AB
9.
T
E
A
6
4
1
5
C
EN 101
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