WM8729

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WOLFSON MICROELECTRONICS LTD

PP Rev 1.2 April 2001

10

AUTOMUTED

(Internal Signal)

10k

Ω

SOFTMUTE

(Internal Signal)

MUTEB

PIN

Figure 6 Selection Logic for MUTE Modes

INPUT FORMAT SELECTION

FORMAT (pin 16) controls the data input format.

FORMAT

INPUT DATA MODE

0

20-bit right justified (note 2)

1

24-bit I

Table 3 Input Format Selection

Notes:

1.

In 24 bit I

a minimum of 24 BCKINs and low for a minimum of 24 BCKINs, unless Note 2.

2.

If exactly 16 BCKIN cycles occur in both the low and high period of LRCIN the WM8729 will

assume the data is 16 bit and accept the data accordingly.

DE-EMPHASIS CONTROL

DEM (pin 15) is an input control for selection of de-emphasis filtering to be applied.

DEM

DE-EMPHASIS

0Off

1On

Table 4 De-emphasis Control