WM8720

Production Data

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PD Rev 4.0. February 2005

9

AUDIO DATA INTERFACE

The Serial Data interface to WM8720 is fully compatible with both normal (MSB first, right-justified) or

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the number of data bits, i.e. normally 32 in 16-bit mode) or unpacked (more than 32 bit clocks per

LRCIN period).

The WM8720 will automatically detect 16-bit packed data being sent to the device in normal mode,

and accept the data in this input format accordingly.

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DESCRIPTION

0

Normal format (MSB-first, right justified)

1

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Table 2 Serial Interface Formats

MSB

MSB

LSB

LSB

LEFT CHANNEL

RIGHT CHANNEL

LRCIN

BCKIN

DIN

1/fs

12

3

n

n-1

n-2

12

3

n

n-1

n-2

Figure 4 Normal Data Input Timing

MSB

MSB

LSB

LSB

LEFT CHANNEL

RIGHT CHANNEL

LRCIN

BCKIN

DIN

1/fs

123

n

n-1

n-2

12

3

n

n-1

n-2

Figure 5 I