參數(shù)資料
型號(hào)： PCM3794RHBRG4
元件分類： Codec
英文描述： 16-Bit, Low-Power Stereo Audio CODEC With Microphone Bias, Headphone, and Digital Speaker Amplifier
中文描述： 16位，低功耗立體聲音頻編解碼器麥克風(fēng)偏置，耳機(jī)，揚(yáng)聲器放大器和數(shù)字
文件頁數(shù)： 32/63頁
文件大?。?/td> 915K
代理商： PCM3794RHBRG4
www.ti.com
PCM3793
PCM3794
SLES193A–AUGUST 2006–REVISED SEPTEMBER 2006
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 68
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
RSV
PMUL
ATL5
ATL4
ATL3
ATL2
ATL1
ATL0
Register 69
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
RSV
PMUR
ATR5
ATR4
ATR3
ATR2
ATR1
ATR0
IDX[6:0]:
100 0100b (44h): Register 68
IDX[6:0]:
100 0101b (45h): Register 69
PMUL: Digital Soft Mute Control for DAL (DAC, L-Channel)
PMUR: Digital Soft Mute Control for DAR (DAC R-Channel)
Default value: 0
The digital input to the DAC can be independently muted or unmuted. The transition from the current volume
level to mute, or the return to the previous volume setting from mute, occurs at the rate of one 1-dB step for
each 8/f
time period. When PMUL and PMUR = 0, the digital data is increased from mute to the previous
attenuation level, and when PMUL and PMUR = 1, the digital data is decreased from the current attenuation
level to mute. In the PCM3793/94, audible zipper noise can be reduced by using zero-cross detection (register
85, ZCRS).
PMUL, PMUR = 0
PMUL, PMUR = 1
Mute disabled (default)
Mute enabled
ATL[5:0]: Digital Attenuation Setting for DAL (L-Channel DAC)
ATR[5:0]: Digital Attenuation Setting for DAR (R-Channel DAC)
Default value: 11 1111b
The digital inputs to the DAC can be independently attenuated. The attenuation of each digital input is controlled
in 1-dB step for every 8/f
S
time period. Audible zipper noise in the PCM3793/94 can be reduced by changing the
attenuation with zero-cross detection (register 85, ZCRS).
Table 8. Digital Attenuation Setting
ATL[5:0],
ATR[5:0]
ATTENUATION LEVEL
SETTING
ATL[5:0],
ATR[5:0]
ATTENUATION LEVEL
SETTING
ATL[5:0],
ATR[5:0]
ATTENUATION LEVEL
SETTING
11 1111
3F
0 dB (default)
10 1001
29
–22 dB
01 0011
13
–44 dB
11 1110
3E
–1 dB
10 1000
28
–23 dB
01 0010
12
–45 dB
11 1101
3D
–2 dB
10 0111
27
–24 dB
01 0001
11
–46 dB
11 1100
3C
–3 dB
10 0110
26
–25 dB
01 0000
10
–47 dB
11 1011
3B
–4 dB
10 0101
25
–26 dB
00 1111
0F
–48 dB
11 1010
3A
–5 dB
10 0100
24
–27 dB
00 1110
0E
–49 dB
11 1001
39
–6 dB
10 0011
23
–28 dB
00 1101
0D
–50 dB
11 1000
38
–7 dB
10 0010
22
–29 dB
00 1100
0C
–51 dB
11 0111
37
–8 dB
10 0001
21
–30 dB
00 1011
0B
–52 dB
11 0110
36
–9 dB
10 0000
20
–31 dB
00 1010
0A
–53 dB
11 0101
35
–10 dB
01 1111
1F
–32 dB
00 1001
09
–54 dB
11 0100
34
–11 dB
01 1110
1E
–33 dB
00 1000
08
–55 dB
11 0011
33
–12 dB
01 1101
1D
–34 dB
00 0111
07
–56 dB
11 0010
32
–13 dB
01 1100
1C
–35 dB
00 0110
06
–57 dB
11 0001
31
–14 dB
01 1011
1B
–36 dB
00 0101
05
–58 dB
11 0000
30
–15 dB
01 1010
1A
–37 dB
00 0100
04
–59 dB
10 1111
2F
–16 dB
01 1001
19
–38 dB
00 0011
03
–60 dB
10 1110
2E
–17 dB
01 1000
18
–39 dB
00 0010
02
–61 dB
10 1101
2D
–18 dB
01 0111
17
–40 dB
00 0001
01
–62 dB
10 1100
2C
–19 dB
01 0110
16
–41 dB
00 0000
00
Mute
10 1011
2B
–20 dB
01 0101
15
–42 dB
10 1010
2A
–21 dB
01 0100
14
–43 dB
32
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