XWM8706EDS Ver la hoja de datos (PDF) - Wolfson Microelectronics plc

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XWM8706EDS

24-bit, 192kHz Stereo DAC with Volume Control

Wolfson Microelectronics plc 

WM8706

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INPUT FORMAT SELECTION

In hardware mode, MLIIS (pin 28) and CSBIWO (pin 23) become input controls for selection of

input data format type and input data word length.

MLIIS

0

0

1

1

Table 3 Input Format Selection

CSBIWO

0

1

0

1

INPUT DATA MODE

24-bit right justified**

20-bit right justified

16-bit I2S

24-bit I2S

Note:

In 24 bit I2S mode, any width of 24 bits or less is supported provided that LRCIN is high for a

minimum of 24 BCKINs and low for a minimum of 24 BCKINs.

** This mode differs from the WM8716 which does 16-bit right justified in this mode. The

previous mode is still available by using exactly 32 BCKIN per LRCIN cycle, 16 for left and

right. This mode is automatically detected within the hardware and overrides the data width

specified but not the format.

DE-EMPHASIS CONTROL

In hardware mode, MCDM1 (pin 27) and MDDM0 (pin 26) become input controls for selection

of de-emphasis filtering to be applied.

MCDM1

0

0

1

1

Table 4 De-emphasis Control

MDDM0

0

1

0

1

DE-EMPHASIS**

Off

48kHz

44.1kHz

32kHz

Note:

** The actual de-emphasis within the WM8706 is the same for all data rates. This differs from

WM8716 which has a different response for each sample rate.

SOFTWARE CONTROL INTERFACE

SELECTION OF CONTROL MODE

The WM8706 may be programmed to operate in hardware or software control modes. This is

achieved by setting the state of the MODE pin.

MODE

INTERFACE FORMAT

0

Hardware Control Mode

1

Software Control Mode

Table 5 Control Interface Mode Selection

WOLFSON MICROELECTRONICS LTD

PP Rev 1.2 April 2001

14

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