PCM3793RHB BURR-BROWN [Burr-Brown Corporation], PCM3793RHB Datasheet - Page 32

• Manufacturer Part Number: PCM3793RHB
• Description: 16-Bit, Low-Power Stereo Audio CODEC With Microphone Bias, Headphone, and Digital Speaker Amplifier
• Manufacturer: BURR-BROWN [Burr-Brown Corporation]

PCM3793
PCM3794
SLES193A – AUGUST 2006 – REVISED SEPTEMBER 2006
32
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
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).
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
attenuation with zero-cross detection (register 85, ZCRS).
Register 68
Register 69
PMUL, PMUR = 0
PMUL, PMUR = 1
11 1111
11 1110
11 1101
11 1100
11 1011
11 1010
11 1001
11 1000
11 0111
11 0110
11 0101
11 0100
11 0011
11 0010
11 0001
11 0000
10 1111
10 1110
10 1101
10 1100
10 1011
10 1010
ATL[5:0],
ATR[5:0]
S
time period. When PMUL and PMUR = 0, the digital data is increased from mute to the previous
3F
3E
3D
3C
3B
3A
2F
2E
2D
2C
2B
2A
39
38
37
36
35
34
33
32
31
30
B15
0
0
ATTENUATION LEVEL
IDX6
IDX6
B14
0 dB (default)
SETTING
–10 dB
–11 dB
–12 dB
–13 dB
–14 dB
–15 dB
–16 dB
–17 dB
–18 dB
–19 dB
–20 dB
–21 dB
S
–1 dB
–2 dB
–3 dB
–4 dB
–5 dB
–6 dB
–7 dB
–8 dB
–9 dB
IDX5
IDX5
B13
time period. Audible zipper noise in the PCM3793/94 can be reduced by changing the
IDX4
IDX4
B12
Mute disabled (default)
Mute enabled
Table 8. Digital Attenuation Setting
IDX3
IDX3
B11
10 1001
10 1000
10 0111
10 0110
10 0101
10 0100
10 0011
10 0010
10 0001
10 0000
01 1111
01 1110
01 1101
01 1100
01 1011
01 1010
01 1001
01 1000
01 0111
01 0110
01 0101
01 0100
ATL[5:0],
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ATR[5:0]
IDX2
IDX2
B10
IDX1
IDX1
1D
1C
29
28
27
26
25
24
23
22
21
20
1F
1E
1B
1A
19
18
17
16
15
14
B9
IDX0
IDX0
ATTENUATION LEVEL
B8
SETTING
RSV
RSV
–22 dB
–23 dB
–24 dB
–25 dB
–26 dB
–27 dB
–28 dB
–29 dB
–30 dB
–31 dB
–32 dB
–33 dB
–34 dB
–35 dB
–36 dB
–37 dB
–38 dB
–39 dB
–40 dB
–41 dB
–42 dB
–43 dB
B7
PMUL
PMUR
B6
ATR5
ATL5
B5
01 0011
01 0010
01 0001
01 0000
00 1111
00 1110
00 1101
00 1100
00 1011
00 1010
00 1001
00 1000
00 0111
00 0110
00 0101
00 0100
00 0011
00 0010
00 0001
00 0000
ATL[5:0],
ATR[5:0]
ATL4
ATR4
B4
ATR3
ATL3
0F
0E
0D
0C
0B
0A
13
12
11
10
09
08
07
06
05
04
03
02
01
00
B3
ATTENUATION LEVEL
ATR2
ATL2
B2
SETTING
–44 dB
–45 dB
–46 dB
–47 dB
–48 dB
–49 dB
–50 dB
–51 dB
–52 dB
–53 dB
–54 dB
–55 dB
–56 dB
–57 dB
–58 dB
–59 dB
–60 dB
–61 dB
–62 dB
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ATR1
ATL1
Mute
B1
ATR0
ATL0
B0