PCM4202-EP Datasheet, PDF (16/29 Pages) Texas Instruments – High-Performance, 24 Bit, 216 kHz Sampling, Stereo Audio Analog-to-Digital Converte

PCM4202-EP
SGLS388 – JUNE 2007
Table 3. Sampling Mode Selection for PCM Slave Mode Operation
FS2
FS1
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
FS0
SAMPLING MODE
0
Single Rate with Clock Auto-Detection
1
Dual Rate with Clock Auto-Detection
0
Quad Rate with Clock Auto-Detection
1
Reserved
0
Reserved
1
Reserved
0
Reserved
1
Reserved
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Table 4. Sampling Mode Selection for DSD Output Mode Operation
FS2
FS1
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
FS0
SAMPLING MODE
0
128 f_S DSD Output Rate with f_SCKI = 768 f_S
1
128 f_S DSD Output Rate with f_SCKI = 512 f_S
0
128 f_S DSD Output Rate with f_SCKI = 384 f_S
1
128 f_S DSD Output Rate with f_SCKI = 256 f_S
0
64 f_S DSD Output Rate with f_SCKI = 384 f_S
1
64 f_S DSD Output Rate with f_SCKI = 256 f_S
0
Reserved
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
Justified, Right Justified, and Philips I²S.
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
0
0
1
1
FMT0
0
1
0
1
AUDIO DATA FORMAT
24 bit Left Justified
24 bit I²S
24 bit Right Justified
1 bit DSD (Master Mode Only)
16
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