wm8742 Wolfson Microelectronics plc, wm8742 Datasheet - Page 24

• Manufacturer Part Number: wm8742
• Description: 24-bit 192khz Dac With Advanced Digital Filtering
• Manufacturer: Wolfson Microelectronics plc

WM8742
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DSP MODE A
In DSP mode A, the first bit is sampled on the BCLK rising edge following the one that detects a low
to high transition on LRCLK. No BCLK edges are allowed between the data words. The word order
is DIN left, DIN right.
Figure 17 DSP Mode A Timing Diagram
DSP MODE B
In DSP mode B, the first bit is sampled on the BCLK rising edge, which detects a low to high
transition on LRCLK. No BCLK edges are allowed between the data words. The word order is DIN
left, DIN right.
Figure 18 DSP Mode B Timing Diagram
PCM MODE SAMPLING RATES
The WM8742 supports master clock rates of 128fs to 768fs, where fs is the audio sampling frequency
(LRCLK), typically 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz or 192kHz.
The WM8742 has a master clock detection circuit that automatically determines the relationship
between the master clock frequency and the sampling rate.
synchronised with LRCLK, although the WM8742 is tolerant of phase differences or jitter on this
clock.
The master clock should be
PD, Rev 4.2,August 2009
Production Data
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