STV8203 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'STV8203' PDF : 31 Pages View PDF
STV8203
PROGRAMMING THE DEVICE (continued)
STD-CT-IIS (SWD Control)
Address
Type
Reset
: 04
: R/W
: 0001 1000
bit 7
0
bit 6
0
bit 5
GAIN
bit 4
DEMOFF
bit 3
MUTE
bit 2
bit 1
SWD
bit 0
GAIN
DEMOFF
MUTE
SWD
: 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
: bypasses the FM or Nicam de-emphasis : 1 = de-emphasis off
: mutes the DAC (FM or Nicam) : 1 = DAC muted
(only effective if the AUTOSTANDARD function is off)
: 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
FM CH1 mono
X
D1
D1
001
Zweiton mono
X
D1
D1
00
50µs
010
Zweiton dual mono
01
10
D1
D2
D2
D2
D1
D1
11
D2
D1
011
Zweiton stereo
X
DSL
DSR
100
not used
101
Nicam mono
X
N1
N1
00
N1
N2
110
J17
Nicam dual mono
01
10
N2
N2
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
Type
: 05-06
:R
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
FM DC LEVEL 1 OR FM DC LEVEL 2
bit 1
bit 0
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.
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