MSP 34x1G
PRELIMINARY DATA SHEET
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.
00 02hex
00 31hex
Bass Loudspeaker Channel
Bass Headphone Channel
BASS_MAIN
BASS_AUX
bit[15:8] extended range
7Fhex
78hex
70hex
68hex
+20 dB
+18 dB
+16 dB
+14 dB
normal range
60hex
58hex
...
+12 dB
+11 dB
08hex
00hex
F8hex
...
+1 dB
0 dB
−1 dB
A8hex
A0hex
−11 dB
−12 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.
34
Micronas
MICRONAS [ MICRONAS ]
