De-Emphasis Control (Bit 1); Adc Control - Address 04H; Functional Mode (Bits 7:6); Adc Digital Interface Format (Bit 4) - Cirrus Logic CS4265 Manual

6.3.3

De-Emphasis Control (Bit 1)

Function:
The standard 50/15 s digital de-emphasis filter response,
rate of 44.1 kHz when the DeEmph bit is configured as shown in
only in Single-Speed Mode.
6.4

ADC Control - Address 04h

7 6
FM1 FM0
6.4.1

Functional Mode (Bits 7:6)

Function:
Selects the required range of sample rates.
FM1
0
0
1
1
6.4.2

ADC Digital Interface Format (Bit 4)

Function:
The required relationship between LRCK, SCLK and SDOUT is defined by the ADC Digital Interface For-
mat bit. The options are detailed in
38
DeEmph
0
1

Table 8. De-Emphasis Control

Gain
dB
T1=50 µs
0dB
-10dB
F1
3.183 kHz
Figure 17. De-Emphasis Curve
5 4
Reserved ADC_DIF
FM0
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

Table 10
Figure
Table
Description
Disabled (default)
44.1 kHz de-emphasis
T2 = 15 µs
F2 Frequency
10.61 kHz
3
Reserved MuteADC
Mode
and may be seen in Figure 5
17, may be implemented for a sample
8. NOTE: De-emphasis is available
2 1
HPFFreeze
and Figure 6.
CS4265
0
M/S
DS657F3