MSP3411G Datasheet, PDF (31/102 Pages) Micronas – Multistandard Sound Processor Family with Virtual Dolby Surround

PRELIMINARY DATA SHEET
MSP 34x1G
Table 3–11: Write Registers on I²C Subaddress 12_hex, continued
Register
Address
(continued)
Function
FM Matrix Modes
Name
FM_MATRIX
00 0E_hex
00 10_hex
00 16_hex
00 12_hex
00 0D_hex
Defines the dematrix function for the demodulated FM signal
bit [7:0]
00_hex
01_hex
02_hex
03_hex
04_hex
no matrix (used for bilingual and unmatrixed stereo sound)
German stereo (Standard B/G)
Korean stereo (also used for BTSC, EIA-J and FM Radio)
sound A mono (left and right channel contain the mono
sound of the FM/AM mono carrier)
sound B mono
In case of Automatic Sound Select, the FM Matrix Mode is set automatically,
i.e. the low-part of any I²C transmission to the register 00 0E_hex is ignored.
To enable a Forced Mono Mode for all analog stereo systems by overriding the
internal pilot or identification evaluation, the following steps must be transmitted:
1. MODUS with bit[0] = 0 (Automatic Sound Select off)
2. FM Presc./Matrix with FM Matrix = Sound A Mono (SAP: Sound B Mono)
3. Select FM/AM source channel, with channel matrix set to “Stereo” (transparent)
NICAM Prescale
PRE_NICAM
Defines the input prescale value for the digital NICAM signal
bit [15:8]
00_hex ... 7F_hex prescale gain
examples:
00_hex
20_hex
5A_hex
7F_hex
off
0 dB gain
9 dB gain (recommendation)
+12 dB gain (maximum gain)
I2S1 Prescale
I2S2 Prescale
Defines the input prescale value for digital I²S input signals
bit [15:8]
00_hex ... 7F_hex prescale gain
examples:
00_hex
10_hex
7F_hex
off
0 dB gain (recommendation)
+18 dB gain (maximum gain)
SCART Input Prescale
PRE_I2S1
PRE_I2S2
PRE_SCART
Defines the input prescale value for the analog SCART input signal
bit [15:8]
00_hex ... 7F_hex prescale gain
examples:
00_hex
19_hex
off
0 dB gain (2 V_RMS input leads to digital full scale)
Due to the Dolby requirements, this is the maximum
7F_hex
value allowed to prohibit clipping of a 2 V_RMS input signal.
+14 dB gain (400 mV_RMS input leads to digital full scale)
MICRONAS INTERMETALL
31