STD-CT-IIS (SWD Control)

Address

: 04

Type

: R/W

Reset

: 0001 1000

bit 7

bit 6

bit 5

bit 4

bit 3

bit 2

bit 1

bit 0

0

0

GAIN

DEMOFF

MUTE

SWD

GAIN

: which should normally be set to its default value, can be used to change the dematrix gain

for CH1 = L+R.

dematrix gain : 0 : channel 1 = L/2+R/2, 1 : channel 1 = L+R

DEMOFF

: bypasses the FM or Nicam de-emphasis : 1 = de-emphasis off

MUTE

: mutes the DAC (FM or Nicam) : 1 = DAC muted

(only effective if the AUTOSTANDARD function is off)

SWD

: Bits allow control of the mode of the switch/dematrix function as shown below.

(only effective if the AUTOSTANDARD function is off)

[2:0]

De-emphasis

Description

NICON[1:0]

Left

Right

000

50

µs

FM CH1 mono

X

D1

D1

001

Zweiton mono

X

D1

D1

010

Zweiton dual mono

00

D1

D2

01

D2

D2

10

D1

D1

11

D2

D1

011

Zweiton stereo

X

DSL

DSR

100

not used

101

J17

Nicam mono

X

N1

N1

110

Nicam dual mono

00

N1

N2

01

N2

N2

10

N1

N1

11

N2

N1

111

Nicam stereo

X

NSL

NSR

D1 = FM audio from CH1, D2 = FM audio from CH2, DS = dematrixed Zweiton stereo.

N1 = Nicam M1, N2 = Nicam M2, NS = Nicam stereo.

These bits are controlled by AUTOSTANDARD when this function is activated.

FMDC1, FMDC2 (FM DC Level)

Address

: 05-06

Type

: R

bit 7

bit 6

bit 5

bit 4

bit 3

bit 2

bit 1

bit 0

FM DC LEVEL 1 OR FM DC LEVEL 2

FM Frequency offset (dependent on the PLL coefficients).

This value (2’s complement) is proportional to the DC offset, measured below 20Hz, of an FM signal. It

could be used to implement an AFC for FM signals.

PROGRAMMING THE DEVICE (continued)

STV8203

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