ADC 320F Especificaciones descargar pdf (Pagina 3)

Contents

Preface ............................................................................................................................... 7

1 Analog-to-Digital Converter (ADC) ................................................................................ 9

1.1 Features ............................................................................................................ 10

1.2 Autoconversion Sequencer Principle of Operation ........................................................... 12

1.2.1 Sequential Sampling Mode ............................................................................. 13

1.2.2 Simultaneous Sampling Mode .......................................................................... 14

1.3 Uninterrupted Autosequenced Mode ........................................................................... 19

1.3.1 Sequencer Start/Stop Mode (Sequencer Start/Stop Operation With Multiple

Time-Sequenced Triggers) ............................................................................. 21

1.3.2 Simultaneous Sampling Mode .......................................................................... 23

1.3.3 Input Trigger Description ............................................................................... 23

1.3.4 Interrupt Operation During Sequenced Conversions ............................................... 24

1.4 ADC Clock Prescaler ............................................................................................. 26

1.4.1 ADC-module Clock and Sample Rate ................................................................. 26

1.5 Low-power Modes ................................................................................................. 26

1.6 Power-up Sequence .............................................................................................. 27

1.7 Sequencer Override Feature .................................................................................... 27

1.8 ADC Calibration ................................................................................................... 28

1.8.1 ADC_Cal Assembly Routine Method .................................................................. 29

1.8.2 Pointer to-Function Method ............................................................................. 29

1.9 Internal/External Reference Voltage Selection ................................................................ 30

1.10 Offset Error Correction............................................................................................ 31

1.11 ADC to DMA Interface ............................................................................................ 32

2 ADC Registers ......................................................................................................... 33

2.1 ADC Control Registers ........................................................................................... 34

2.2 Maximum Conversion Channels Register (ADCMAXCONV) ............................................... 38

2.3 Autosequence Status Register (ADCASEQSR) ............................................................... 40

2.4 ADC Status and Flag Register (ADCST) ....................................................................... 41

2.5 ADC Reference Select Register (ADCREFSEL) .............................................................. 43

2.6 ADC Offset Trim Register (ADCOFFTRIM) .................................................................... 43

2.7 ADC Input Channel Select Sequencing Control Registers .................................................. 44

2.8 ADC Conversion Result Buffer Registers (ADCRESULTn).................................................. 45

SPRU812A – September 2007 – Revised October 2007 Contents 3

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ADC 320F Especificaciones Pagina 3