TDA9581 データシートの表示（PDF） - Philips Electronics

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TDA9581

TV signal processor-Teletext decoder with embedded µ-Controller

Philips Electronics 

Table 1 Pin functions for various versions

IC version

FM-PLL version

AM/FM MODE (1)

AMFM bit

0

1

East-West Y/N

N

Y

N

CMB1/CMB0 bits 00 01/10/11

00

01/10/11

−

00

AM bit

−

−

−

−

0

1

−

Pin 20

AVL

EWD

DECSDEM

Pin 28

AUDEEM

SIFIN1

Pin 29

Pin 31

Pin 32

SNDIF(3)

DECSDEM

SNDPLL

REFO AVL/SNDIF(3) REFO

SIFIN2

SNDPLL SIFAGC(2)

AUDEEM/AMOUT AMOUT

Pin 35

AUDEXT

AUDEXT

AUDEXT

Pin 44

AUDOUT

controlled audio out

QSS VERSION

NORMAL MODE

0

N

01/10/11

00

0

1

−

AVL

SIFIN1

SIFIN2

SIFAGC

REFO

AMOUT

QSSO AMOUT AUDEXT

controlled AM out

Y

01/10/11

0

1

EWD

REFO

QSSO AMOUT

Note

1. When the AM/FM mode is chosen several pins have a different function. For this reason this mode can be selected only when the adapted

application is used.

2. When in the AM/FM mode the AM bit is activated a capacitor with a value of about 2.2 µF has to be switched externally in parallel with the sound

PLL filter

3. When additional (external) selectivity is required for FM-PLL system pin 32 can be used as sound IF input. This function is selected by means of

SIF bit in subaddress 21H.

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