參數(shù)資料
型號: HT82A851R
廠商: Holtek Semiconductor Inc.
英文描述: USB Audio MCU
中文描述: USB音頻控制器
文件頁數(shù): 21/43頁
文件大小: 304K
代理商: HT82A851R
HT82A851R
Rev. 1.20
21
June 15, 2007
Result (dB)
USVC
Result (dB)
USVC
Result (dB)
USVC
Result (dB)
USVC
6
000_1100
2
111_1100
10
110_1100
24
101_1100
5.5
000_1011
2.5
111_1011
10.5
110_1011
25
101_1011
5
000_1010
3
111_1010
11
110_1010
26
101_1010
4.5
000_1001
3.5
111_1001
11.5
110_1001
27
101_1001
4
000_1000
4
111_1000
12
110_1000
28
101_1000
3.5
000_0111
4.5
111_0111
13
110_0111
29
101_0111
3
000_0110
5
111_0110
14
110_0110
30
101_0110
2.5
000_0101
5.5
111_0101
15
110_0101
31
101_0101
2
000_0100
6
111_0100
16
110_0100
32
101_0100
1.5
000_0011
6.5
111_0011
17
110_0011
1
000_0010
7
111_0010
18
110_0010
0.5
000_0001
7.5
111_0001
19
110_0001
0
000_0000
8
111_0000
20
110_0000
0.5
111_1111
8.5
110_1111
21
101_1111
1
111_1110
9
110_1110
22
101_1110
1.5
111_1101
9.5
110_1101
23
101_1101
Speaker Volume Control Table
Label
R/W
Power-on
Functions
FIFO0~
FIFO4
R/W
xxH
EPi accessing register (i = 0~4). When an endpoint is disabled, the corresponding
accessing register should be disabled.
FIFO0~4 (28H~2CH) USB Endpoint Accessing Register Definitions
Digital PGA
Bit No.
Label
Functions
0~5
PGA0~PGA5
There are six bits to control the digital PGA (0~19.5 dB). The PGA is a digital amplifier
used to amplify the 16-bit data that comes from the PCM ADC. The PGA value versus
gain relationship is shown in the follow table.
6
Undefined bit, read as 0 .
7
MUTE_MKB
Microphone mute Control:
MUTE_MKB =0: Mute microphone input.
MUTE_MKB =1: Normal.
PGA_CTRL (30H) Register
PGA_CRTL Value (PGA5~PGA0)
Gain (dB)
000000
0
000001
0.5
:
:
:
:
100111
19.5
101000
19.5
:
:
:
:
111111
19.5
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