MCF51QE128 MCU Series Reference Manual, Rev. 3
Freescale Semiconductor 15
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Section Number Title Page
11.1.5 Block Diagram ................................................................................................................219
11.2 External Signal Description ..........................................................................................................220
11.2.1 Analog Power (VDDAD) ..................................................................................................221
11.2.2 Analog Ground (VSSAD) .................................................................................................221
11.2.3 Voltage Reference High (VREFH) ...................................................................................221
11.2.4 Voltage Reference Low (VREFL) ....................................................................................221
11.2.5 Analog Channel Inputs (ADx) ........................................................................................221
11.3 Register Definition ........................................................................................................................221
11.3.1 Status and Control Register 1 (ADCSC1) ......................................................................221
11.3.2 Status and Control Register 2 (ADCSC2) ......................................................................223
11.3.3 Data Result High Register (ADCRH) .............................................................................223
11.3.4 Data Result Low Register (ADCRL) ..............................................................................224
11.3.5 Compare Value High Register (ADCCVH) ....................................................................224
11.3.6 Compare Value Low Register (ADCCVL) .....................................................................225
11.3.7 Configuration Register (ADCCFG) ................................................................................225
11.3.8 Pin Control 1 Register (APCTL1) ..................................................................................226
11.3.9 Pin Control 2 Register (APCTL2) ..................................................................................227
11.3.10Pin Control 3 Register (APCTL3) ..................................................................................228
11.4 Functional Description ..................................................................................................................229
11.4.1 Clock Select and Divide Control ....................................................................................230
11.4.2 Input Select and Pin Control ...........................................................................................230
11.4.3 Hardware Trigger ............................................................................................................230
11.4.4 Conversion Control .........................................................................................................230
11.4.4.1 Initiating Conversions ...................................................................................231
11.4.4.2 Completing Conversions ...............................................................................231
11.4.4.3 Aborting Conversions ...................................................................................231
11.4.4.4 Power Control ...............................................................................................232
11.4.4.5 Sample Time and Total Conversion Time ....................................................232
11.4.5 Automatic Compare Function .........................................................................................233
11.4.6 MCU Wait Mode Operation ............................................................................................233
11.4.7 MCU Stop3 Mode Operation ..........................................................................................234
11.4.7.1 Stop3 Mode With ADACK Disabled ............................................................234
11.4.7.2 Stop3 Mode With ADACK Enabled .............................................................234
11.4.8 MCU Stop2 Mode Operation ..........................................................................................234
11.5 Initialization Information ..............................................................................................................234
11.5.1 ADC Module Initialization Example .............................................................................235
11.5.1.1 Initialization Sequence ..................................................................................235
11.5.1.2 Pseudo-Code Example ..................................................................................235
11.6 Application Information ................................................................................................................236
11.6.1 External Pins and Routing ..............................................................................................236
11.6.1.1 Analog Supply Pins ......................................................................................237
11.6.1.2 Analog Reference Pins ..................................................................................237