PCM4202-EP

SGLS388

– JUNE 2007

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Table 3. Sampling Mode Selection for PCM Slave Mode Operation

FS2

FS1

FS0

SAMPLING MODE

0

0

0

Single Rate with Clock Auto-Detection

0

0

1

Dual Rate with Clock Auto-Detection

0

1

0

Quad Rate with Clock Auto-Detection

0

1

1

Reserved

1

0

0

Reserved

1

0

1

Reserved

1

1

0

Reserved

1

1

1

Reserved

Table 4. Sampling Mode Selection for DSD Output Mode Operation

FS2

FS1

FS0

SAMPLING MODE

0

0

0

0

0

1

0

1

0

0

1

1

1

0

0

1

0

1

1

1

0

Reserved

1

1

1

Reserved

AUDIO DATA FORMATS

As mentioned previously, the PCM4202 supports 24 bit linear PCM output data, as well as 1 bit DSD output data.

The available data formats are dependent upon whether the PCM4202 is configured in Slave or Master mode.

The S/M (pin 8), FMT0 (pin 6), and FMT1 (pin 7) inputs are utilized to select either Slave or Master mode and the

corresponding audio data format.

In Slave mode, the PCM bit and left/right clocks (BCK and LRCK) are configured as input pins. DSD data formats

are not supported in Slave mode. Slave mode supports commonly used PCM audio data formats, including Left

In Master mode, the PCM bit and left/right clocks (BCK and LRCK respectively) are configured as output pins,

and are derived from the system clock input (SCKI). Alternatively, the DSD output data may be provided at the

port output.

Table 5 shows the available data format selections. Figure 3 and Figure 4 illustrate the PCM and DSD data

formats.

Table 5. Audio Data Format Selection

FMT1

FMT0

AUDIO DATA FORMAT

0

0

24 bit Left Justified

0

1

1

0

24 bit Right Justified

1

1

1 bit DSD (Master Mode Only)

16

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© 2007, Texas Instruments Incorporated

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