STV8236 datasheet(2/97 Pages) STMICROELECTRONICS

2 / 97 page

STV82x6

2/97

Table of Contents

Chapter 1

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

1.1

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

1.2

Typical Applications

......................................................................................................... 6

1.3

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

Chapter 2

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

2.1

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

2.2

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

Chapter 3

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

3.1

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

3.2

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

3.3

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

3.4

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

3.5

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

3.6

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

3.7

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

3.8

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

3.9

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

3.10

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

Chapter 4

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

4.1

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

4.2

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

Chapter 5

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

5.1

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

5.2

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

5.3

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

5.4

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

Chapter 6

I²S Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

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