WM9715L datasheet(3/77 Pages) WOLFSON

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Production Data

WM9715L

PD Rev 4.0 December 2007

TOUCHPANEL INTERFACE................................................................................38

PRINCIPLE OF OPERATION - FOUR-WIRE TOUCHPANEL ..................................... 38

PRINCIPLE OF OPERATION - FIVE-WIRE TOUCHPANEL........................................ 40

CONTROLLING THE TOUCHPANEL DIGITISER ....................................................... 42

AUXILIARY ADC INPUTS ....................................................................................47

BATTERY MEASUREMENT USING THE BMON/AUX3 PIN ....................................... 47

BATTERY ALARM AND ANALOGUE COMPARATORS ....................................48

INTERRUPT CONTROL.......................................................................................51

THE ADCIRQ PIN ........................................................................................................ 51

THE PENDOWN PIN ................................................................................................... 51

THE GENIRQ PIN........................................................................................................ 51

POWER MANAGEMENT .....................................................................................54

UNUSED ANALOGUE INPUTS AND OUTPUTS ......................................................... 57

AC97 DATA AND CONTROL INTERFACE .........................................................58

INTERFACE PROTOCOL............................................................................................ 58

INTERFACE TIMING ................................................................................................... 59

APPLICATIONS INFORMATION .........................................................................72

RECOMMENDED EXTERNAL COMPONENTS........................................................... 72

RECOMMENDED COMPONENTS VALUES ............................................................... 73

LINE OUTPUT ............................................................................................................. 73

AC-COUPLED HEADPHONE OUTPUT....................................................................... 74

DC COUPLED (CAPLESS) HEADPHONE OUTPUT ................................................... 74

BTL LOUDSPEAKER OUTPUT ................................................................................... 75

COMBINED STEREO HEADSET / BTL EAR SPEAKER ............................................. 75

COMBINED HEADSET / SINGLE-ENDED EAR SPEAKER......................................... 75

PACKAGE DIMENSIONS ....................................................................................76

IMPORTANT NOTICE ..........................................................................................77

ADDRESS:................................................................................................................... 77

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