参数资料
型号: PCM3794RHBR
厂商: TEXAS INSTRUMENTS INC
元件分类: 通信及网络
英文描述: SPECIALTY TELECOM CIRCUIT, PQCC32
封装: 5 X 5 MM, GREEN, PLASTIC, QFN-32
文件页数: 28/67页
文件大小: 1417K
代理商: PCM3794RHBR
www.ti.com
SLES193C – AUGUST 2006 – REVISED FEBRUARY 2007
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 71
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
RSV
SPSE
SPS1
SPS0
DFQ1
DFQ0
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.
SPSE = 0
Disable (default)
SPSE = 1
Enable
SPS[1:0]: Spectrum Spreading Efficiency
Default value: 00
The efficiency of spectrum spreading technology can be changed to low, medium, or high.
SPS[1:0]
Spectrum Spreading Efficiency
00
Low (default)
01
Medium
10
High
11
Reserved
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.
DFQ[1:0]
Class D Amplifier Switching Frequency
00
1.5 MHz (default)
01
2.25 MHz
10
2.65 MHz
11
3 MHz
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 72
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
RSV
PMXR
PMXL
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.
PMXL, PMXR = 0
Power down (default)
PMXL, PMXR = 1
Power up
34
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