TDA6812-5 Datasheet, PDF (10/32 Pages) Siemens Semiconductor Group – TV-Stereo Processor

TDA 6812-5
g) Switching Byte IV
MSB •
•
•
•
•
•
LSB
MPX0 MPX1 QSt BE
Mono P1
P2
Matrix
MPX0
0
0
1
MPX1
0
1
0
MPX-Period
2s
Power-ON
4s
8s
Recommended C_36,38
1 µF
2.2 µF
4.7 µF
Perm. Xtal Tolerances
± 20 ppm
± 10 ppm
± 5 ppm
Settings specially recommended for crystal operation
0
0
2s
0
1
4s
470 nF
330 nF
± 40 ppm
± 70 ppm
MXP-period = 2 s means that identification-signal decoder searches 1 s for dual and 1 s for stereo.
It is basically permissible, for the given C_36,38, to make the MPX period longer, but not shorter.
QSt
QSt
BE
BE
Mono
Mono
P1
P1
P2
P2
Matrix
Matrix
=0
=1
=0
=1
=0
=1
=0
=1
=0
=1
=0
=1
Quasi-stereo OFF; power ON
Quasi-stereo ON
Stereo base enlargement OFF; power ON
Stereo base enlargement ON
Identification-signal decoder set to stereo and held; power ON
Normal operation of identification-signal decoder
Port 1 (open collector) low (low-impedance); power ON
Port 1 high (high impedance)
Port 2 (open collector) low (low-impedance); power ON
Port 2 high (high impedance)
Gain matrix 0 dB
Gain matrix 6 dB; power ON
h) Talk Mode
MSB
•
•
•
•
•
•
LSB
St
D
T3
T4
T5
CL
X
X
0
0
Decoder detects mono
1
0
Decoder detects stereo
0
1
Decoder detects dual
1
1
Suppressed internally
CL = 1
Loudspeaker signal path at clipping limit
(CL is automatically reset after each reading operation)
T3 thru T5 are test bits.
Semiconductor Group
122