MSP3415G ETC, MSP3415G Datasheet - Page 37

• Manufacturer Part Number: MSP3415G
• Description: MSP 34x5G Multistandard Sound Processor Family
• Manufacturer: ETC

PRELIMINARY DATA SHEET
3.4. Programming Tips
This section describes the preferred method for initial-
izing the MSP 34x5G. The initialization is grouped into
four sections:
– SCART Signal Path (analog signal path)
– Demodulator
– SCART and I
– Output Channels
See Fig. 2–1 on page 8 for a complete signal flow.
SCART Signal Path
1. Select analog input for the SCART baseband pro-
cessing (SCART DSP Input Select) by means of the
ACB register.
2. Select the source for each analog SCART output
Demodulator
For a complete setup of the TV sound processing from
analog IF input to the source selection, the following
steps must be performed:
1. Set MODUS register to the preferred mode and
Sound IF input.
2. Set preferred prescale (FM and NICAM) values.
3. Write STANDARD SELECT register.
4. If Automatic Sound Select is not active:
SCART and I
1. Set preferred prescale for SCART.
2. Set preferred prescale for I
Output Channels
1. Select the source channel and matrix for each out-
put channel.
2. Set audio baseband processing.
3. Select volume for each output channel.
Micronas
(SCART Output Select) by means of the ACB regis-
ter.
Choose FM matrix repeatedly according to the
sound mode indicated in the STATUS register.
(set to 0 dB after RESET).
2
S Inputs
2
S Inputs
2
S inputs
3.5. Examples of Minimum Initialization Codes
Initialization of the MSP 34x5G according to these list-
ings reproduces sound of the selected standard on the
loudspeaker output. All numbers are hexadecimal. The
examples have the following structure:
1. Perform an I
2. Write MODUS register
3. Set Source Selection for loudspeaker channel
4. Set Prescale
5. Write STANDARD SELECT register.
6. Set Volume loudspeaker channel to 0 dB.
3.5.1. B/G-FM (A2 or NICAM)
<80 00 80 00>
<80 00 00 00>
<80 10 00 30 20 03>
<80 12 00 08 03 20>
<80 12 00 0E 24 03>
<80 12 00 10 5A 00>
<80 10 00 20 00 03>
<80 10 00 20 00 08>
<80 12 00 00 73 00>
3.5.2. BTSC-Stereo
<80 00 80 00>
<80 00 00 00>
<80 10 00 30 20 03>
<80 12 00 08 03 20>
<80 12 00 0E 24 03>
<80 10 00 20 00 20>
<80 12 00 00 73 00>
3.5.3. BTSC-SAP with SAP at Loudspeaker Channel
<80 00 80 00>
<80 00 00 00>
<80 10 00 30 20 03>
<80 12 00 08 03 20>
<80 12 00 0E 24 03>
<80 10 00 20 00 21>
<80 12 00 00 73 00>
(with Automatic Sound Select).
(with matrix set to STEREO).
(FM and/or NICAM and dummy FM matrix).
or
2
C controlled reset of the IC.
// Softreset
// MODUS-Register: Automatic = on
// Source Sel. = (St or A) & Ch. Matr. = St
// FM/AM-Prescale = 24
// NICAM-Prescale = 5A
// Standard Select: A2 B/G or NICAM B/G
// Loudspeaker Volume 0 dB
// Softreset
// MODUS-Register: Automatic = on
// Source Sel. = (St or A) & Ch. Matr. = St
// FM/AM-Prescale = 24
// Standard Select: BTSC-STEREO
// Loudspeaker Volume 0 dB
// Softreset
// MODUS-Register: Automatic = on
// Source Sel. = (St or A) & Ch. Matr. = St
// FM/AM-Prescale = 24
// Standard Select: BTSC-SAP
// Loudspeaker Volume 0 dB
FM-Matrix = MONO/SOUNDA
FM-Matrix = Sound A Mono
FM-Matrix = Sound A Mono
MSP 34x5G
hex
hex
hex
hex
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