PRELIMINARY DATA SHEET
MSP 44x8G
3.3.2.1. STANDARD SELECT Register
As long as the STANDARD RESULT register contains
a value greater than 07 FFhex, the Automatic Standard
Detection is still active. During this period, the MODUS
and STANDARD SELECT register must not be written.
The STATUS register will be updated when the Auto-
matic Standard Detection has finished.
The TV sound standard of the MSP 44x8G demodula-
tor is determined by the STANDARD SELECT register.
There are two ways to use the STANDARD SELECT
register:
– Setting up the demodulator for a TV sound standard
by sending the corresponding standard code with a
single I2C-Bus transmission.
If a present sound standard is impossible for a specific
MSP version, it detects and switches to the analog
mono sound of this standard.
– Starting the Automatic Standard Detection for ter-
restrial TV standards. This is the most comfortable
way to set up the demodulator. Within 0.5 s, the
detection and set-up of the actual TV sound stan-
dard is performed. The detected standard can be
read out of the STANDARD RESULT register by the
control processor. This feature is recommended for
the primary set-up of a TV set. Outputs should be
muted during Automatic Standard Detection.
Example:
The MSPs 4438G and 4448G will detect a B/G-NICAM
signal as standard 3 and will switch to the analog FM-
Mono sound.
Table 3–8: Results of the Automatic Standard
Detection
The Standard Codes are listed in Table 3–7.
Broadcasted Sound
Standard
STANDARD RESULT Register
Read 007Ehex
Selecting a TV sound standard via the STANDARD
SELECT register initializes the demodulator. This
includes: AGC, tuning frequency, band-pass filters,
demodulation mode (FM, AM, or NICAM), carrier
mute, deemphasis, and identification mode.
Automatic Standard
Detection could not
find a sound standard
0000hex
B/G-FM
B/G-NICAM
I
0003hex
If a present sound standard is impossible for a specific
MSP version, it switches to the analog mono sound of
this standard. In that case, stereo or bilingual process-
ing will not be possible.
0008hex
000Ahex
FM-Radio
0040hex
For a complete setup of the TV sound processing from
analog IF input to the source selection, the following
transmissions are necessary: MODUS register, STAN-
DARD SELECT register, prescale values, FM matrix.
M-FM
EIA-J
BTSC
0002hex (if MODUS[14,13]=00)
0020hex (if MODUS[14,13]=01)
0030hex (if MODUS[14,13]=10)
0009hex (if MODUS[12]=0)
0004hex (if MODUS[12]=1)
0009hex (if MODUS[12]=0)
000Bhex (if MODUS[12]=1)
>07FFhex
Note: The FM matrix is set automatically if Automatic
Sound Select is active (MODUS[0]=1). In this case, the
FM matrix will be initialized with “Sound A Mono”. Dur-
ing operation, the FM matrix will be automatically
selected according to the actual identification informa-
tion.
L-AM
D/K1
D/K2
L-NICAM
D/K-NICAM
3.3.2.2. STANDARD RESULT Register
Automatic Standard
Detection still active
If Automatic Standard Detection is selected in the
STANDARD SELECT register, status and result of the
Automatic Standard Detection process can be read out
of the STANDARD RESULT register. The possible
results are based on the mentioned Standard Code
and are listed in Table 3–8.
In cases where no sound standard has been detected
(no standard present, too much noise, strong interfer-
ers, etc.) the STANDARD RESULT register contains
00 00hex. In that case, the controller has to start further
actions (for example, set the standard according to a
preference list or by manual input).
Micronas
21
MICRONAS [ MICRONAS ]
