MAS3587F Micronas, MAS3587F Datasheet - Page 45

• Manufacturer Part Number: MAS3587F
• Description: MPEG Layer 3 Audio Encoder/Decoder
• Manufacturer: Micronas

ADVANCE INFORMATION
Table 3–12: Codec control registers on I
Micronas
Register
Address
(hex)
00 15
00 1E
Function
Treble
bit[15:8]
Higher resolution is possible, one LSB step results in a gain step of about
1/8 dB.
With positive treble settings, clipping of the output signal may occur. There-
fore, it is not recommended to set treble to a value that, in conjunction with
loudness and volume, would result in an overall positive gain.
The settings require: max (bass, treble) + loudness + volume
bit[7:0]
Loudness
bit[15:8]
bit[7:0]
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
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.
Loudness Gain
44
40
...
04
00
Loudness Mode
00
04
Treble range
60
58
...
08
00
F8
...
A8
A0
Not used, must be set to 0
hex
hex
hex
hex
hex
hex
hex
hex
hex
hex
hex
hex
hex
normal (constant volume at 1 kHz)
Super Bass (constant volume at 2 kHz)
17 dB
16 dB
1 dB
0 dB
2
C subaddress 6C
12 dB
11 dB
1 dB
0 dB
1 dB
11 dB
12 dB
hex
0 dB
0 dB
MAS 3587F
Name
TREBLE
LDNESS
45