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STV8226T

Multistandard TV Audio Processor and Digital Sound Demodulator

STMicroelectronics 

Table of Contents

STV82x6

Chapter 1

1.1

1.2

1.3

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Overview .............................................................................................................................. 5

Typical Applications ......................................................................................................... 6

I/O Pin Description ............................................................................................................. 10

Chapter 2

2.1

2.2

Demodulator Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Digital Demodulator ............................................................................................................ 12

System Clock ..................................................................................................................... 16

Chapter 3

3.1

3.2

3.3

3.4

3.5

3.6

3.7

3.8

3.9

3.10

Audio Processor Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Main Features .................................................................................................................... 17

Smart Volume Control (SVC) ............................................................................................. 18

ST WideSurround ............................................................................................................... 19

5-Band Audio Equalizer ..................................................................................................... 19

Bass/Treble Control ........................................................................................................... 19

Volume/Balance Control .................................................................................................... 20

Automatic Loudness Control .............................................................................................. 22

Subwoofer Control ............................................................................................................. 22

Beeper ................................................................................................................................ 22

SRS™ 3D Surround (STV8226/36 only) ............................................................................ 23

Chapter 4

4.1

4.2

Audio Matrices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Input Audio Matrix .............................................................................................................. 26

Output Audio Matrix ........................................................................................................... 26

Chapter 5

5.1

5.2

5.3

5.4

Additional Controls and Flags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Interrupt Request ............................................................................................................... 27

I²C Bus Expander ............................................................................................................... 27

Stereo Flag ......................................................................................................................... 27

Headphone Detection ........................................................................................................ 27

Chapter 6 I²S Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

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