MSP34X1G Datasheet, PDF (101/104 Pages) Micronas – Multistandard Sound Processor Family with Virtual Dolby Surround

PRELIMINARY DATA SHEET
MSP 34x1G
6.8. Exclusions of Audio Baseband Features
In general, all functions can be switched independently.
Two exceptions exist:
1. NICAM cannot be processed simultaneously with
the FM2 channel.
2. FM adaptive deemphasis cannot be processed
simultaneously with FM-identification.
6.9. Phase Relationship of Analog Outputs
The analog output signals: Loudspeaker, headphone,
and SCART2 all have the same phases. The user
does not need to correct output phases when using
these analog outputs directly. The SCART1 output has
opposite phase.
Using the I²S-outputs for other DSPs or D/A convert-
ers, care must be taken to adjust for the correct phase.
If the attached coprocessor is one of the MSP family,
the following schematics help to determine the phase
relationship.
6.10. Compatibility Restrictions to MSP 34xxD
The MSP 34x1G is fully hardware compatible to the
MSP 34xxD. However, to substitute a MSP 34xxD by
the corresponding MSP 34x1G, the controller software
has to be adapted slightly:
1. The register FM-Matrix (00 0E_hex low part) must be
changed from “no matrix (00_hex)” to “sound A mono
(03_hex)” during mono transmission of all TV-sound
standards (see also Table 6–17).
2. With the MSP 34x1G, the STANDARD SELECTION
initializes the FM-deemphasis, which is not the case
for the MSP 34xxD. So, if STANDARD SELECTION
is applied, this I²C instruction can be omitted.
I²S_IN1/2 I²S_OUT1/2
SCART1
SCART2
SCART3
SCART4
MONO
SCART
DSP
Input
Select
Audio
Baseband
Processing
SCART1-Ch.
SCART2-Ch.
MONO, SCART1...4
SCART
Output Select
Fig. 6–2: Phase diagram of the MSP 34x1G
Loudspeaker
Headphone
SCART1
SCART2
Micronas
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