CS4245 データシートの表示（PDF） - Cirrus Logic

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CS4245

104 dB, 24-Bit, 192 kHz Stereo Audio CODEC

Cirrus Logic 

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

43

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