CS4245
6.3.4
De-Emphasis Control (Bit 1)
Function:
The standard 50/15 ? s digital de-emphasis filter response, Figure 20 , may be implemented for a sample
rate of 44.1 kHz when the DeEmph bit is configured as shown in Table 9 . NOTE: De-emphasis is available
only in Single-Speed Mode.
DeEmph
0
1
Description
Disabled (default)
44.1 kHz de-emphasis
Table 9. De-Emphasis Control
Gain
dB
T1=50 μs
0dB
T2 = 15 μs
-10dB
F1
3.183 kHz
F2
10.61 kHz
Frequency
Figure 20. De-Emphasis Curve
6.3.5
6.4
DAC Master / Slave Mode (Bit 0)
Function:
This bit selects either master or slave operation for serial audio port 2. Setting this bit will select Master
Mode, while clearing this bit will select Slave Mode.
ADC Control - Address 04h
7
ADC_FM1
6
ADC_FM0
5
Reserved
4
ADC_DIF
3
Reserved
2
MuteADC
1
HPFFreeze
0
ADC_M/S
6.4.1
ADC Functional Mode (Bits 7:6)
Function:
Selects the required range of output sample rates.
44
ADC_FM1
0
0
1
1
ADC_FM0
0
1
0
1
Mode
Single-Speed Mode: 4 to 50 kHz sample rates
Double-Speed Mode: 50 to 100 kHz sample rates
Quad-Speed Mode: 100 to 200 kHz sample rates
Reserved
Table 10. Functional Mode Selection
DS656F3
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