PRELIMINARY DATA SHEET
MSP 34x2G
Table 3–11: Write Registers on I2C Subaddress 12hex, continued
Register
Address
Function
Name
00 20hex
Tone Control Mode Loudspeaker Channel
TONE_MODE
bit[15:8] 00hex
FFhex
bass and treble is active
equalizer is active
Defines whether Bass/Treble or Equalizer is activated for the loudspeaker chan-
nel. Bass and Equalizer cannot work simultaneously. If Equalizer is used, Bass,
and Treble coefficients must be set to zero and vice versa.
Note: In the MULTI_CHANNEL mode, the equalizer cannot be used.
00 02hex
00 31hex
Bass Loudspeaker Channel
Bass Headphone Channel
BASS_MAIN
BASS_AUX
bit[15:8] normal range
60hex
58hex
...
+12 dB
+11 dB
08hex
00hex
F8hex
...
+1 dB
0 dB
−1 dB
A8hex
A0hex
−11 dB
−12 dB
bit[15:8] extended range
7Fhex
78hex
70hex
68hex
+20 dB
+18 dB
+16 dB
+14 dB
Higher resolution is possible: an LSB step in the normal range results in a gain
step of about 1/8 dB, in the extended range about 1/4 dB.
With positive bass settings, internal clipping may occur even with overall volume
less than 0 dB. This will lead to a clipped output signal. Therefore, it is not rec-
ommended to set bass to a value that, in conjunction with volume, would result
in an overall positive gain.
Micronas
37
MICRONAS [ MICRONAS ]
