参数资料
型号: AS3658-BCTP
厂商: ams
文件页数: 100/158页
文件大小: 0K
描述: IC PMU POWER/AUDIO 124-CTBGA
标准包装: 2,500
应用: 便携式设备
电流 - 电源: 7mA
电源电压: 3 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 124-TFBGA
供应商设备封装: 124-CTBGA(8x8)
包装: 带卷 (TR)
AS3658
Data Sheet Confidential
- Detailed Description- Audio Functions
Table 103. LINE_IN_L Register
Addr:86
LINE_IN_L
These bits control the LINE_IN volume and functions
Bit
Bit Name
Default
Access
Description
volume settings for right line input, adjustable in 32 steps @
1.5dB; gain from line input pin (LIN1L) to mixer input
00000
-34.5 dB gain
4:0
lil_vol
00000
R/W
00001
-33 dB gain
.....
11110
11111
10.5 dB gain
12 dB gain
Control of MUTE switch
5
mute_off_inl
0
R/W
0
left line input is set to mute
1
normal operation
7:6
9.7
Five Band Equalizer
00
n/a
do not change
The 5 Band equalizer is build of one low pass, one high pass and 3 band pass filter, and is optimized for 44.1kHz
sample frequency:
Low pass filter: 200Hz ( when programming negaitve gain values, this filter changes to a HP filter)
Band pass filter1: 340Hz / Q=1.0 (when programming negative gain values, this filter changes to a notch filter)
Band pass filter2: 1100Hz / Q=0.7 (when programming negative gain values, this filter changes to a notch filter)
Band pass filter3: 3375Hz / Q=1.0 (when programming negative gain values, this filter changes to a notch filter)
High pass filter: 5940Hz (when pragramming negative gain values, this filter changes to a LP filter)
The Q factors and the cut off frequency of the High and low pass filter are measured at 50% gain and are valid for
+6dB amplification of each band.
The attenuation or amplification of each band can be dynamically adjusted by the serial interface. Additional a pre-gain
stage can adjust the input level. This gain stage is after the 16 to 24 bit extension and therefore additional gain, which
is compensated with the equalizer filter itself (eq_lp_gain, eq_band1,2,3_gain, eq_hp_gain) will not cause clipping:
Figure 45. Equalizer Block Diagram
 
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