STM8S datasheet(428/467 Pages) STMICROELECTRONICS

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Analog/digital converter (ADC)

RM0016

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DocID14587 Rev 14

Analog/digital converter (ADC)

24.1

Introduction

ADC1 and ADC2 are 10-bit successive approximation Analog to Digital Converters. They

have up to 16 multiplexed input channels (the exact number of channels is indicated in the

datasheet pin description). A/D Conversion of the various channels can be performed in

single, and continuous modes.

ADC1 has extended features for scan mode, buffered continuous mode and analog

watchdog. Refer to the datasheet for information about the availability of ADC1 and ADC2 in

specific product types.

24.2

ADC main features

These features are available in ADC1 and ADC2.

•

10-bit resolution

•

Single and continuous conversion modes

•

Programmable prescaler: fMASTER divided by 2 to 18

•

External trigger option using external interrupt (ADC_ETR) or timer trigger (TRGO)

•

Analog zooming (in devices with VREF pins)

•

Interrupt generation at End of Conversion

•

Data alignment with in-built data coherency

•

ADC input range: VSSA ≤VIN ≤VDDA

24.3

ADC extended features

These features are available in ADC1.

•

Buffered continuous conversion mode(a)

•

Scan mode for single and continuous conversion

•

Analog watchdog with upper and lower thresholds

•

Interrupt generation at analog watchdog event

The block diagrams of ADC1 and ADC2 are shown in Figure 159 and Figure 160

a. Data buffer size is product dependent (10 x 10 bits or 8 x 10 bits). Please refer to the datasheet.

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