MSP3410G Micronas, MSP3410G Datasheet - Page 97

• Manufacturer Part Number: MSP3410G
• Description: Multistandard Sound Processor Family
• Manufacturer: Micronas

DATA SHEET
6.4. Manual/Compatibility Mode:
Note: The use of these register is no longer recom-
All registers except C_AD_BITs are 8 bits wide. They
can be read out of the RAM of the MSP 34x0G if the
MSP 34x0D Manual/Compatibility Mode is required.
All transmissions take place in 16-bit words. The valid
8-bit data are the 8 LSBs of the received data word.
If the Automatic Sound Select feature is not used, the
NICAM or FM-identification parameters must be read
and evaluated by the controller in order to enable
appropriate switching of the channel select matrix of
the baseband processing part. The FM-identification
registers are described in section 6.6.1. To handle the
NICAM-sound and to observe the NICAM-quality, at
least the registers C_AD_BITS and ERROR_RATE
must be read and evaluated by the controller. Addi-
tional data bits and CIB bits, if supplied by the NICAM
transmitter, can be obtained by reading the registers
ADD_BITS and CIB_BITS.
6.4.1. NICAM Mode Control/Additional Data Bits
NICAM operation mode control bits and A[2:0] of the
additional data bits.
Format:
Important: “S” = Bit[0] indicates correct NICAM-syn-
chronization (S = 1). If S = 0, the MSP 3410/3450G
has not yet synchronized correctly to frame and
sequence, or has lost synchronization. The remaining
read registers are therefore not valid. The MSP mutes
the NICAM output automatically and tries to synchro-
nize again as long as MODE_REG[6] is set.
The operation mode is coded by C4-C1 as shown in
Table 6–16.
Micronas
Auto
_FM
11
MSB
Description of Demodulator Read Registers
mended. It should be used only in cases where
software compatibility to the MSP 34x0D is
required. Using the STANDARD SELECTION
register together with the STATUS register pro-
vides a more economic way to program the
MSP 34x0G and to retrieve information from the
IC.
Register
...
...
A[2]
7
C_AD_BITS 00 23
A[1]
6
A[0]
5
C4
4
C3
hex
3
C2
2
C1
1
May 27, 2003; 6251-476-1DS
LSB
0
S
Table 6–16: NICAM operation modes as defined by
the EBU NICAM 728 specification
Note: It is no longer necessary to read out and evalu-
ate the C_AD_BITS. All evaluation is performed in the
MSP and indicated in the STATUS register.
6.4.2. Additional Data Bits Register
Contains the remaining 8 of the 11 additional data bits.
The additional data bits are not yet defined by the
NICAM 728 system.
Format:
6.4.3. CIB Bits Register
CIB bits 1 and 2 (see NICAM 728 specifications).
Format:
C4
0
0
0
0
1
1
1
1
x
AUTO_FM: monitor bit for the AUTO_FM Status:
0: NICAM source is NICAM
1: NICAM source is FM
A[10]
MSB
MSB
7
7
x
C3
0
0
0
0
0
0
0
0
1
A[9]
6
6
x
C2
0
0
1
1
0
0
1
1
x
A[8]
5
5
x
C1
0
1
0
1
0
1
0
1
x
ADD_BITS 00 38
CIB_BITS 00 3E
A[7]
Operation Mode
Stereo sound (NICAMA/B),
independent mono sound (FM1)
Two independent mono signals
(NICAMA, FM1)
Three independent mono channels
(NICAMA, NICAMB, FM1)
Data transmission only; no audio
Stereo sound (NICAMA/B), FM1
carries same channel
One mono signal (NICAMA). FM1
carries same channel as NICAMA
Two independent mono channels
(NICAMA, NICAMB). FM1 carries
same channel as NICAMA
Data transmission only; no audio
Unimplemented sound coding
option (not yet defined by EBU
NICAM 728 specification)
4
4
x
A[6]
3
3
x
MSP 34x0G
hex
hex
A[5]
2
2
x
CIB1
A[4]
1
1
CIB2
LSB
LSB
A[3]
0
0
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