DATA SHEET
MSP 34x0G
Table 3–11: Write Registers on I2C Subaddress 12hex, continued
Register
Address
Function
Name
00 69hex
Micronas BASS Amplitude Limit
MB_LIM
bit[15:8] 00hex
0 dBFS (default limitation)
FFhex
...
−1 dBFS
E0hex
−32 dBFS
bit[7:0]
00hex
must be zero
The Micronas BASS Amplitude Limit defines the maximum allowed amplitude at
the output of the MB relative to 0 dbFS. If the amplitude exceeds MB_LIM, the
gain of the MB is automatically reduced. Note that the Volume Clipping Mode
must be set to “dynamic” (see page 32).
00 6Ahex
Micronas BASS Harmonic Content
MB_HMC
bit[15:8] 00hex
3Fhex
no harmonics are added (default)
50% fundamentals + 50% harmonics
100% harmonics
7Fhex
bit[7:0]
00hex
must be zero
MB creates harmonics of the frequencies below the MB highpass frequency
(MB_HP). The variable MB_HMC describes the ratio of the harmonics towards
the original signal.
00 6Bhex
Micronas BASS Low Pass Corner Frequency
MB_LP
bit[15:8] 5dec
50 Hz
60 Hz
6dec
...
30dec
300 Hz
bit[7:0]
00dec
must be zero
The MB lowpass corner frequency (range 50...300 Hz) defines the upper corner
frequency of the MB bandpass filter. Recommended values are the same as for
the MB highpass corner frequency (MB_HP).
00 6Chex
Micronas BASS High Pass Corner Frequency
MB_HP
bit[15:8] 3dec
30 Hz
40 Hz
4dec
...
30dec
300 Hz
bit[7:0]
00hex
must be zero
The MB highpass corner frequency defines the lower corner frequency of the
MB bandpass filter. The highpass filter avoids loading the loudspeakers with low
frequency components that are below the speakers’ cut off frequency. Recom-
mended values for subwoofer systems are around 5dec (=50 Hz), for regular TV
sets around 10dec (=100 Hz).
Micronas
May 27, 2003; 6251-476-1DS
39
MICRONAS [ MICRONAS ]
