WM5102 datasheet(117/334 Pages) WOLFSON

117 / 334 page

Production Data

WM5102

PD, June 2014, Rev 4.2

117

Four different audio data formats are supported by the digital audio interface:



DSP mode A



DSP mode B



I2S



Left Justified

The Left Justified and DSP-B modes are valid in Master mode only (ie. BCLK and LRCLK are outputs

from the WM5102). These modes cannot be supported in Slave mode.

All four of these modes are MSB first. Data words are encoded in 2’s complement format. Each of the

audio interface modes is described in the following sections. Refer to the “Signal Timing

Requirements” section for timing information.

Two variants of DSP mode are supported - ‘Mode A’ and ‘Mode B’. Mono PCM operation can be

supported using the DSP modes.

MASTER AND SLAVE MODE OPERATION

The WM5102 digital audio interfaces can operate as a master or slave as shown in Figure 43 and

Figure 44. The associated control bits are described in “Digital Audio Interface Control”.

Figure 43 Master Mode

Figure 44 Slave Mode

AUDIO DATA FORMATS

The WM5102 digital audio interfaces can be configured to operate in I2S, Left-Justified, DSP-A or

DSP-B interface modes. Note that Left-Justified and DSP-B modes are valid in Master mode only (ie.

BCLK and LRCLK are outputs from the WM5102).

The digital audio interfaces also provide flexibility to support multiple ‘slots’ of audio data within each

LRCLK frame. This flexibility allows multiple audio channels to be supported within a single LRCLK

frame.

The data formats described in this section are generic descriptions, assuming only one stereo pair of

audio samples per LRCLK frame. In these cases, the AIF is configured to transmit (or receive) in the

first available position in each frame (ie. the Slot 0 position).

The options for multi-channel operation are described in the following section (“AIF Timeslot

Configuration”).

The audio data modes supported by the WM5102 are described below. Note that the polarity of the

BCLK and LRCLK signals can be inverted if required; the following descriptions all assume the

default, non-inverted polarity of these signals.

WM5102 Datasheet(PDF) 117 Page - Wolfson Microelectronics plc