PCM3793RHB BURR-BROWN [Burr-Brown Corporation], PCM3793RHB Datasheet - Page 34

• 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
34
IDX[6:0]: 100 0111b (47h): Register 71
SPSE: Enable of Spectrum Spreading
Default value: 0
The class-D speaker amplifier output can cause RF interference due to switching noise. The PCM3793 can
reduce peak noise by the use of spectrum spreading technology when SPSE = 1.
SPS[1:0]: Spectrum Spreading Efficiency
Default value: 00
The efficiency of spectrum spreading technology can be changed to low, medium, or high.
DFQ[1:0]: Switching Frequency for Speaker Amplifier (Class-D)
Default value: 00
Switching frequency for the class-D speaker amplifier can be selected to avoid interference with other
equipment.
IDX[6:0]: 100 1000b (48h) Register 72
PMXR: Power Up/Down for MXR (Mixer R-Channel)
PMXL: Power Up/Down for MXL (Mixer L-Channel)
Default value: 0
These bits are used to control power up and down for the analog mixer.
Register 71
SPSE = 0
SPSE = 1
SPS[1:0]
00
01
10
11
DFQ[1:0]
00
01
10
11
Register 72
PMXL, PMXR = 0
PMXL, PMXR = 1
B15
B15
0
0
IDX6
IDX6
B14
B14
Disable (default)
Enable
Spectrum Spreading Efficiency
Low (default)
Medium
High
Reserved
Class D Amplifier Switching Frequency
1.5 MHz (default)
2.25 MHz
2.65 MHz
3 MHz
IDX5
IDX5
B13
B13
Power down (default)
Power up
IDX4
IDX4
B12
B12
IDX3
IDX3
B11
B11
Submit Documentation Feedback
IDX2
IDX2
B10
B10
IDX1
IDX1
B9
B9
IDX0
IDX0
B8
B8
RSV
RSV
B7
B7
RSV
RSV
B6
B6
RSV
RSV
B5
B5
SPSE
RSV
B4
B4
SPS1
RSV
B3
B3
SPS0
RSV
B2
B2
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PMXR
DFQ1
B1
B1
DFQ0
PMXL
B0
B0