STV8203 データシートの表示（PDF） - STMicroelectronics

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STV8203

MULTISTANDARD TV SOUND DEMODULATOR

STMicroelectronics 

STV8203

PROGRAMMING THE DEVICE (continued)

PRE-LINE-IN (IF Input Selection and Audio Matrix Gain Control)

Address

Type

Reset

: 07

: R/W

: 0000 1000

bit 7

bit 6

IF SWITCH AGC SWITCH OFF

bit 5

0

bit 4

0

bit 3

bit 2

bit 1

LINE INPUTS GAIN

bit 0

IF SWITCH

: IF Input Switch

controls the IF input selection (0 = IF1).

AGC SWITCH OFF : can be used to switch-off the AGC amplifier..

LINE INPUTS GAIN

: allow the levels of the analog line inputs (SCART1, SCART2 and MONO) to be

adjusted simultaneously.

1000 0dB (default setting)

0010 -6dB

1110 +6dB

(step size = 1dB, range = ±6dB)

AUD-MX-CNT (Audio Matrix Control)

Address

Type

Reset

: 08

: R/W

: 0010 0010

bit 7

MOUT1

bit 6

bit 5

S1 O/P SELECT

bit 4

bit 3

MOUT0

bit 2

bit 1

S2 O/P SELECT

bit 0

These 8 bits are used to control the audio matrix configuration (see Figure 1).

Data bits

Actual Function Selected

7 6 5 4 3 2 1 0 Reset : AO1 and AO2 = DAC and MOUT = (L1+R1)/2

X X X X X 0 0 0 AO2 = Muted

X X X X X 0 0 1 AO2 = Muted

X X X X X 0 1 0 AO2 = AO1 (reset state)

X X X X X 0 1 1 AO2 = LI1 (Scart 1 input)

X X X X X 1 0 0 AO2 = Muted

X X X X X 1 0 1 AO2 = Muted

X X X X X 1 1 0 AO2 = Muted

X X X X X 1 1 1 AO2 = Muted

X 0 0 0 X X X X AO1 = Muted

X 0 0 1 X X X X AO1 = MIN

X 0 1 0 X X X X AO1 = DAC (reset state)

X 0 1 1 X X X X AO1 = Muted

X 1 0 0 X X X X AO1 = LI2 (Scart 2 input)

X 1 0 1 X X X X AO1 = Muted

X 1 1 0 X X X X AO1 = Muted

X 1 1 1 X X X X AO1 = Muted

0 X X X 0 X X X MOUT = (L1+R1)/2 (reset state)

0 X X X 1 X X X MOUT = R1

1 X X X 0 X X X MOUT = L1

1 X X X 1 X X X Not used

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