WM8802SCFV datasheet(10/65 Pages) WOLFSON

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WM8802

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PP Rev 1.1 April 2004

DEVICE DESCRIPTION

INITIAL SYSTEM SETTINGS

SYSTEM RESET (XMODE)

The system operates normally when XMODE is set to High after applying a supply voltage of 3.0V or

greater. Following power ON, the system is reset by setting XMODE to Low again.

A 10k

Ω pull-down or pull-up resistor can be used to set EMPHA/UO, AUDIO /VO, CKST and

INT for the following:

•

chip address

•

demodulation function master or slave

•

modulation function or general-purpose I/O function settings

If EMPHA/UO, AUDIO /VO, CKST , and INT are not pulled up or down, their state is undefined. A

pull-up or pull-down resistor should always be connected to these pins.

SETTING

PINS

Chip address

EMPHA/UO, AUDIO /VO

Demodulation function master or slave

CKST

Modulation function or general-

purpose I/O function

INT

Table 1 Pin Names and Settings

Set pin state

XMODE

DVDD

Normal system operation range

Setting completed

Undefined

Setting input

state

Output state

Setting input

state

Output state

Min 200

µµµµs

3.0V

3.3V

Figure 3 Setting Timing Chart of Function Setting Input Pins

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