Production Data
WM9715L
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
REGISTER MAP...................................................................................................62
REGISTER BITS BY ADDRESS .................................................................................. 63
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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PD Rev 4.0 December 2007
3
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
