WM8988 datasheet(35/56 Pages) WOLFSON

Part #	WM8988

Description	Stereo CODEC for Portable Audio Applications

PDF	56 Pages

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Manufacturer	WOLFSON [Wolfson Microelectronics plc]

Direct Link	http://www.wolfsonmicro.com

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Production Data

WM8988

PD, Rev 4.0, October 2008

Figure 13 I

2S Justified Audio Interface (assuming n-bit word length)

In DSP/PCM mode, the left channel MSB is available on either the 1

st (mode B) or 2nd (mode A)

rising edge of BCLK (selectable by LRP) following a rising edge of LRC. Right channel data

immediately follows left channel data. Depending on word length, BCLK frequency and sample rate,

there may be unused BCLK cycles between the LSB of the right channel data and the next sample.

In device master mode, the LRC output will resemble the frame pulse shown in Figure 14 and Figure

15. In device slave mode, Figure 16 and Figure 17, it is possible to use any length of frame pulse

less than 1/fs, providing the falling edge of the frame pulse occurs greater than one BCLK period

before the rising edge of the next frame pulse.

Figure 14 DSP/PCM Mode Audio Interface (mode A, LRP=0, Master)

Figure 15 DSP/PCM Mode Audio Interface (mode B, LRP=1, Master)

WM8988 Datasheet(PDF) 35 Page - Wolfson Microelectronics plc