WM8990ECS/RV Wolfson Microelectronics, WM8990ECS/RV Datasheet - Page 108

• Manufacturer Part Number: WM8990ECS/RV
• Description: Audio CODECs Stereo CODEC w.Class AB/D speaker driver
• Manufacturer: Wolfson Microelectronics

Specifications of WM8990ECS/RV

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8990
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Figure 68 I2S Justified Audio Interface (assuming n-bit word length)
In DSP mode, the left channel MSB is available on either the 1
edge of BCLK (selectable by AIF_LRCLK_INV) 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 69 and Figure
70. In device slave mode, Figure 71 and Figure 72, 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 69 DSP Mode Audio Interface (mode A, AIF_LRCLK_INV=0, Master)
Figure 70 DSP Mode Audio Interface (mode B, AIF_LRCLK_INV=1, Master)
st
(mode B) or 2
PD, March 2009, Rev 4.0
nd
Production Data
(mode A) rising
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