Hyundai HQL320WR Service Manual page 33

Hyundai ImageQuest LCD TV HQL260WR/320WR
The main function of the TEA6415C is to switch 8 video input sources on the 6 outputs.
Each output can be switched to only one of the inputs, whereas any single input may be connected
to several outputs. The lowest level of each signal is aligned on each input (bottom of sync pulse for
CVBS or Black Level for RGB signals).
The nominal gain between any input and output is 6.5 dB. For Chroma signals, the alignment is
switched off by forcing, with an external 5 V
as a normal input or as a Chroma input (with external resistor bridge). All the switching possibilities
are changed through the I²C bus.
Driving a 75 Ω load requires an external transistor.
The switches configuration is defined by words of 16 bits: one word of 16 bits for each output
channel.
So, 6 words of 16 bits are necessary to determine the starting configuration upon power-on (power
supply: 0 to 10V). But a new configuration needs only the words of the changed output channels.
Figure 1: TEA6415C Block Diagram
Output Output Output Output Output Output
18 17
Input
1
Input 3
Input 5
Input 6
Input 8
Input 10
Input 11
20
Input
2
Data Prog
16 15 14 13
Bus Decoder
7 4 9 19
Clock VCC Ground
resistor bridge on the input. Each input can be used
DC
--32--
Ground
12