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PCM1774 bảng dữ liệu(PDF) 36 Page - Texas Instruments

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tên linh kiện PCM1774
Giải thích chi tiết về linh kiện  16-Bit, Low-Power Stereo Audio DAC With Analog Mixing, Line and Headphone Outputs
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PCM1774 bảng dữ liệu(HTML) 36 Page - Texas Instruments

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PCM1774
SLAS551 – JULY 2007
Register 89
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 89
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
RSV
GMR2
GMR1
GMR0
RSV
GML2
GML1
GML0
IDX[6:0]: 101 1001b (59h): Register 89
GMR[2:0]: Gain Level Control for PG6 (Gain Amplifier for Analog Input or R-Channel Bypass)
GML[2:0]: Gain Level Control for PG5 (Gain Amplifier for Analog Input or L-Channel Bypass)
Default value: 000
These bits are used for setting the gain level of the analog source to the mixing amplifier. It is recommended to
set the gain level to avoid saturation in the analog mixer.
GMR[2:0]
Gain Level Control for PG6
GML[2:0]
Gain Level Control for PG5
0 0 0
–21 dB (default)
0 0 1
–18 dB
0 1 0
–15 dB
0 1 1
–12 dB
1 0 0
–9 dB
1 0 1
–6 dB
1 1 0
–3 dB
1 1 1
0 dB
Register 90
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 90
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
RSV
RSV
RSV
RSV
RSV
RSV
G20R
G20L
IDX[6:0]: 101 1010b (5Ah): Register 90
G20R: 20-dB Boost for PG2 (Gain Amplifier for AIN1R)
Default value: 0
This bit is used to boost the microphone signal when the analog input is small.
G12R
G20R
PG2 GAIN
(REGISTER 124)
(REGISTER 90)
0
0
0 dB (default)
0
1
20 dB
1
0
12 dB
1
1
Reserved
G20L: 20-dB Boost for PG1 (Gain Amplifier for AIN1L)
Default value: 0
This bit is used to boost the microphone signal when the analog input is small.
G12L
G20L
PG1 GAIN
(REGISTER 124)
(REGISTER 90)
0
0
0 dB (default)
0
1
20 dB
1
0
12 dB
1
1
Reserved
36
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