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SAA5667 is a single-chip microcontroller based on 80C51 
microcontroller, which is integrated with On-Screen Display (OSD) and 
Data Capture and display function for Teletext. 

 

It has 32 I/O ports via individual addressable controls, which are 5 V 
tolerant digital inputs and I/O. There are two port lines with 8 mA sink 
for direct drive of LED. The byte level I²C-bus up to 400 kHz dual port 
I/O. 

 

Besides, SAA5667 has large Character ROM that allows up to 1020 
characters of 12 * 10 pixels. There are 64 Characters for OSD. 

 

There is a single crystal oscillator for micro-controller, OSD and data 
capture. The power reduction mode will be Idle, Standby and Power 
down. 

 

Figure 4.1 shows the block diagram of SAA5667. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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MSP3411G-B9 is a  multistandard sound processor. It enables Virtual 
Dolby Surround  and  BBE Digital Sound. It has 4 to 2 stereo matrix 
switching facilities. Besides, it has tone and balance controls as well as 
Automatic Volume Correction for loudspeaker channel. Figure 5.2 
shows the block diagram of MSP3411G. 
 
 

 
 
Figure 5.3 shows the pin diagram of TDA7497 while Figure 5.4 shows 
its block diagram. It is a 10W + 10 W + 18W amplifier that has 
Independent Mute for centre channel and main channel. There is no 
Turn-on Turn-off Pop Noise. Besides, there is protection for short 
circuit and thermal overload. 

 
 
 
 
 
 
 
 
 
 
 
 
 
 

 
 

 

 

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