DATA SHEET
MAS 35x9F
2
Table 3–16: Codec control registers on I C subaddress 6C , continued
hex
Register
Address
(hex)
Function
Name
00 1E
Loudness
LDNESS
bit[15:8] Loudness Gain
44
40
...
+17 dB
+16 dB
hex
hex
04
00
+1 dB
0 dB
hex
hex
bit[7:0]
Loudness Mode
00
04
normal (constant volume at 1 kHz)
Super Bass (constant volume at 2 kHz)
hex
hex
Higher resolution of Loudness Gain is possible: An LSB step results in a gain
step of about 1/4 dB.
Loudness increases the volume of low- and high-frequency signals, while
keeping the amplitude of the 1-kHz reference frequency constant. The
intended loudness has to be set according to the actual volume setting.
Because loudness introduces gain, it is not recommended to set loudness to a
value that, in conjunction with volume, would result in an overall positive gain.
The settings should be: max (bass, treble) + loudness + volume ≤ 0 dB
The corner frequency for bass amplification can be set to two different values.
In Super Bass mode, the corner frequency is shifted up. The point of constant
volume is shifted from 1 kHz to 2 kHz.
Micronas
June 30, 2004; 6251-505-1DS
49
MICRONAS [ MICRONAS ]
