MSP3410B Datasheet, PDF (24/68 Pages) Micronas – Multistandard Sound Processor

MSP 3410 B
PRELIMINARY DATA SHEET
11.6. Software Proposals for Multistandard TV-Sets
To familiarize the reader with the programming scheme
of the MSP 3410 B demodulator part, three examples in
the shape of flow diagrams are shown in the following
sections.
11.6.1. Multistandard Including System B/G with NI-
CAM/FM-Mono only
Fig. 11–1 shows a flow diagram for the CCU software,
applied for the MSP 3410 B in a TV set, which facilitates
NICAM and FM-mono sound. For the instructions,
please refer to Table 11–11.
START
LOAD_SEQ_1/2
Channel 1:
NICAM Parameter
Audio Processing Init
NICAM_START
Pause
NICAM_READ
Yes
NICAM_CHECK
NICAM
?
No
LOAD_REG_1
Fig. 11–1: CCU software flow diagram: Standard B/G/I
NICAM/FM mono only
the MSP 3410 B must be switched to the FM-mono
sound.
11.6.2. Multistandard Including System I with NI-
CAM/FM-Mono only
This case is identical to the one above. The only differ-
ence consists in selecting the UK parameters for
DCO1_LO/HI, DCO2_LO/HI and FIR_REG_1.
11.6.3. Multistandard Including System B/G with NI-
CAM/FM-Mono and German DUAL FM
Fig. 11–3 shows a flow diagram for the CCU software,
applied for the MSP 3410 B in a TV set, which facilitates
all standards according to System B/G. For the instruc-
tions used in the diagram, please refer to Table 11–11.
After having switched on the TV-set and having initial-
ized the MSP 3410 B (LOAD_SEQ_1/2), FM-mono
sound is available.
Fig. 11–3 shows that to check for any stereo or bilingual
audio information in channel 1, its parameter should be
loaded with NICAM and FM2 parameters alternately
(LOAD_SEQ_1). In the case of success the MSP 3410
B has to switch to the desired audio mode.
11.6.4. Satellite Mode
Fig. 11–2 shows the simple flow diagram to be used for
the MSP 3410 B in a satellite receiver. For FM-mono op-
eration the corresponding FM carrier should preferably
be processed at the MSP-channel 2.
START
LOAD_SEQ_1/2
MSP–Channel 1:
FM2–Parameter
MSP–Channel 2:
FM1–Parameter
Audio Processing Init
If the program is changed, resulting in another program
within the Scandinavian System B/G no parameters of
the MSP 3410 B have to be modified. To facilitate the
check for NICAM the CCU has only to continue at the ’NI-
CAM_START’ instruction. During the ’NICAM_CHECK’
24
STOP
Fig. 11–2: CCU software flow diagram: SAT-mode
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