WM8803CDTSLASHV datasheet(19/45 Pages) WOLFSON

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WM8803

PP Rev 1.1 September 2003

OUTPUT DATA FORMATS: SPECIAL MODE (SDATO)

The output format of the audio data is set up after recovery In Special Mode the SDATO audio data

range does not necessarily have to match the input data format.

The output format is set with the OFSEL[2:0] bit. The BCLK, LRCLK, and SDATO synchronize to the

rising edge of CLKOUT. SDATO is synchronizes to the falling edge of BCLK and is clocked on the

rising edge.

After an error is detected and ERROR goes output low, the output data is synchronized with the

LRCLK edge immediately following the error signal.

Bi-phase data output synchronizes to LRCLK and the fs clock of the 128fs clock. However, when the

PLL is unlocked the BCLK changes to the 64fs clock, Figure 8.

The NRZ 28bits data output contains 4 bits validity (V), user data (U), channel status (C), preamble

B (indicated by Z) and 24bit LSB left justified base audio data. When preamble B is confirmed Z-bit

outputs high in that frame, Figures 9 and 10.

A ERROR low signal is output for a signal outside the effective bit length of the NRZ data output.

SDATAO

LRCLK

BCLK

L-ch

R-ch

LSB

MSB

Figure 11 Data Output Timing – Biphase Data Output

SDATAO

LRCLK

BCLK

LSB

-24 bit-

LSB

-24 bit-

28 bits

Notice: ‘Z’ means Preamble ‘B’

L-ch

R-ch

MSB

Figure 12 Data Output Timing – NRZ Data I

2S Output

WM8803CDT/V Datasheet(PDF) 19 Page - Wolfson Microelectronics plc