PRELIMINARY DATA SHEET
MSP 34x2G
Table 3–11: Write Registers on I2C Subaddress 12hex, continued
Register
Address
Function
Name
(continued)
FM Matrix Modes
FM_MATRIX
Defines the dematrix function for the demodulated FM signal
00 0Ehex
bit[7:0]
00hex
01hex
02hex
03hex
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)
04hex
sound B mono
In case of Automatic Sound Select = on, the FM Matrix Mode is set automati-
cally. Writing to the FM/AM prescale register (00 0Ehex high part) is still allowed.
In order not to disturb the automatic process, the low part of any I2C transmis-
sion to this register is ignored. Therefore, any FM-Matrix readback values may
differ from data written previously.
In case of Automatic Sound Select = off, the FM Matrix Mode must be set as
shown in Table 6–17 of Appendix B.
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” (transpar-
ent)
00 10hex
NICAM Prescale
PRE_NICAM
Defines the input prescale value for the digital NICAM signal
bit[15:8] 00hex ... 7Fhex prescale gain
examples:
00hex
20hex
5Ahex
7Fhex
off
0 dB gain
9 dB gain (recommendation)
+12 dB gain (maximum gain)
00 16hex
00 12hex
I2S1 Prescale
I2S2 Prescale
PRE_I2S1
PRE_I2S2
Defines the input prescale value for digital I2S input signals
bit[15:8] 00hex ... 7Fhex prescale gain
examples:
00hex
10hex
7Fhex
off
0 dB gain (recommendation)
+18 dB gain (maximum gain)
Micronas
33
MICRONAS [ MICRONAS ]
