TDA 6812-5

Semiconductor Group

122

g) Switching Byte IV

MXP-period = 2 s means that identification-signal decoder searches 1 s for dual and 1 s for stereo.

QSt

=

0

Quasi-stereo OFF; power ON

QSt

=

1

Quasi-stereo ON

BE

=

0

Stereo base enlargement OFF; power ON

BE

=

1

Stereo base enlargement ON

Mono

=

0

Identification-signal decoder set to stereo and held; power ON

Mono

=

1

Normal operation of identification-signal decoder

P1

=

0

Port 1 (open collector) low (low-impedance); power ON

P1

=

1

Port 1 high (high impedance)

P2

=

0

Port 2 (open collector) low (low-impedance); power ON

P2

=

1

Port 2 high (high impedance)

Matrix

=

0

Gain matrix 0 dB

Matrix

=

1

Gain matrix 6 dB; power ON

h) Talk Mode

CL = 1

Loudspeaker signal path at clipping limit

(CL is automatically reset after each reading operation)

T3 thru T5 are test bits.

MSB

••••••LSB

MPX0

MPX1

QSt

BE

Mono

P1

P2

Matrix

MPX0

MPX1

MPX-Period

Perm. Xtal Tolerances

0

0

2 s

Power-ON

1

µF

± 20 ppm

0

1

4 s

2.2

µF

± 10 ppm

1

0

8 s

4.7

µF

± 5 ppm

Settings specially recommended for crystal operation

0

0

2 s

470 nF

± 40 ppm

0

1

4 s

330 nF

± 70 ppm

MSB

••••••LSB

St

D

T3T4T5CL

X

X

0

0

Decoder detects mono

1

0

Decoder detects stereo

0

1

Decoder detects dual

1

1

Suppressed internally