PRELIMINARY DATA SHEET
MSP 34x1G
6.8. Exclusions of Audio Baseband Features
6.10. Compatibility Restrictions to MSP 34xxD
In general, all functions can be switched independently.
Two exceptions exist:
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. NICAM cannot be processed simultaneously with
the FM2 channel.
1. The register FM-Matrix (00 0Ehex low part) must be
changed from “no matrix (00hex)” to “sound A mono
(03hex)” during mono transmission of all TV-sound
standards (see also Table 6–17).
2. FM adaptive deemphasis cannot be processed
simultaneously with FM-identification.
6.9. Phase Relationship of Analog Outputs
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.
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.
2
2
I S_IN1/2 I S_OUT1/2
Loudspeaker
Headphone
SCART1-Ch.
Audio
Baseband
Processing
SCART1
SCART1
SCART2
SCART3
SCART4
MONO
SCART
DSP
Input
SCART2-Ch.
SCART2
Select
SCART
Output Select
MONO, SCART1...4
Fig. 6–2: Phase diagram of the MSP 34x1G
Micronas
101
MICRONAS [ MICRONAS ]
