CS4245_07 Datasheet, PDF (43/57 Pages) Cirrus Logic – 104 dB, 24-Bit, 192 kHz Stereo Audio CODEC

6.3.4
De-Emphasis Control (Bit 1)
CS4245
Function:
The standard 50/15 μs 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 8. NOTE: De-emphasis is available
only in Single-Speed Mode.
DeEmph
0
1
Description
Disabled (default)
44.1 kHz de-emphasis
Table 8. De-Emphasis Control
Gain
dB
0dB
-10dB
T1=50 µs
T2 = 15 µs
6.3.5
F1
3.183 kHz
F2 Frequency
10.61 kHz
Figure 20. De-Emphasis Curve
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.
6.4 ADC Control - Address 04h
7
ADC_FM1
6
ADC_FM0
5
Reserved
4
ADC_DIF
6.4.1 ADC Functional Mode (Bits 7:6)
3
Reserved
2
MuteADC
Function:
Selects the required range of output sample rates.
ADC_FM1
0
0
1
1
ADC_FM0
Mode
0
Single-Speed Mode: 4 to 50 kHz sample rates
1
Double-Speed Mode: 50 to 100 kHz sample rates
0
Quad-Speed Mode: 100 to 200 kHz sample rates
1
Reserved
Table 9. Functional Mode Selection
1
HPFFreeze
0
ADC_M/S
DS656F2
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