PCM3793 Datasheet, PDF (30/63 Pages) Burr-Brown (TI) – 16-Bit, Low-Power Stereo Audio CODEC With Microphone Bias, Headphone, and Digital Speaker Amplifier

PCM3793
PCM3794
SLES193A – AUGUST 2006 – REVISED SEPTEMBER 2006
Register Definitions
Register 64
Register 65
B15
B14
B13
B12
0
IDX6 IDX5 IDX4
0
IDX6 IDX5 IDX4
B11
IDX3
IDX3
B10
IDX2
IDX2
B9
IDX1
IDX1
B8
IDX0
IDX0
B7
RSV
RSV
B6
HMUL
HMUR
B5
HLV5
HRV5
B4
HLV4
HRV4
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B3
HLV3
HRV3
B2
HLV2
HRV2
B1
HLV1
HRV1
B0
HLV0
HRV0
IDX[6:0]: 100 0000b (40h): Register 64
IDX[6:0]: 100 0001b (41h): Register 65
HMUL: Analog Mute Control for HPL (Line or Headphone L-Channel)
HMUR: Analog Mute Control for HPR (Line or Headphone R-Channel)
Default value: 1
HPOL/LOL and HPOR/LOR can be independently muted to zero level when HMUL and HMUR = 1. The HMUx
mute takes precedence over analog volume level settings.
HMUL, HMUR = 0
HMUL, HMUR = 1
Mute disabled
Mute enabled (default)
HLV[5:0]: Analog Volume for HPL (Headphone L-Channel)
HRV[5:0]: Analog Volume for HPR (Headphone R-Channel)
Default value: 00 0000.
HPOL/LOL and HPOR/LOR can be independently controlled from 6 dB to –70 dB, with step size depending on
the gain level. Outputs may have zipper noise while changing levels. In the PCM3793/94, the noise can be
reduced when making the change by using zero-cross detection (register 85, ZCRS).
HLV[5:0],
HRV[5:0]
11 1111
3F
11 1110
3E
11 1101
3D
11 1100
3C
11 1011
3B
11 1010
3A
11 1001
39
11 1000
38
11 0111
37
11 0110
36
11 0101
35
11 0100
34
11 0011
33
11 0010
32
11 0001
31
11 0000
30
10 1111
2F
10 1110
2E
10 1101
2D
10 1100
2C
10 1011
2B
10 1010
2A
STEP
0.5 dB
Table 6. Headphone Gain Level Setting
GAIN LEVEL
SETTING
6 dB
5.5 dB
5 dB
4.5 dB
4 dB
3.5 dB
3 dB
2.5 dB
2 dB
1.5 dB
1 dB
0.5 dB
0 dB
–0.5 dB
–1 dB
–1.5 dB
–2 dB
–2.5 dB
–3 dB
–3.5 dB
–4 dB
– 4.5 dB
HLV[5:0],
HRV[5:0]
10 1001
29
10 1000
28
10 0111
27
10 0110
26
10 0101
25
10 0100
24
10 0011
23
10 0010
22
10 0001
21
10 0000
20
01 1111
1F
01 1110
1E
01 1101
1D
01 1100
1C
01 1011
1B
01 1010
1A
01 1001
19
01 1000
18
01 0111
17
01 0110
16
01 0101
15
01 0100
14
STEP
0.5 dB
1 dB
GAIN LEVEL
SETTING
–5 dB
–5.5 dB
–6 dB
–6.5 dB
–7 dB
–7.5 dB
–8 dB
–8.5 dB
–9 dB
–9.5 dB
–10 dB
–10.5 dB
–11 dB
–12 dB
–13 dB
–14 dB
–15 dB
–16 dB
–17 dB
–18 dB
–19 dB
–20 dB
HLV[5:0],
HRV[5:0]
01 0011
13
01 0010
12
01 0001
11
01 0000
10
00 1111
0F
00 1110
0E
00 1101
0D
00 1100
0C
00 1011
0B
00 1010
0A
00 1001
09
00 1000
08
00 0111
07
00 0110
06
00 0101
05
00 0100
04
00 0011
03
00 0010
02
00 0001
01
00 0000
00
STEP
1 dB
2 dB
4 dB
GAIN LEVEL
SETTING
–21 dB
–22 dB
–23 dB
–24 dB
–26 dB
–28 dB
–30 dB
–32 dB
–34 dB
–36 dB
–38 dB
–40 dB
–42 dB
–46 dB
–50 dB
–54 dB
–58 dB
–62 dB
–66 dB
–70 dB
30
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