AN3023

Summary of the features

Doc ID 16113 Rev 1

7/23

2

Summary of the features

The STM8A family contains two types of analog-to-digital converter which are named ADC

and ADC2. Depending on the device, it may contain both (ADC and ADC2) or only one

(ADC).

There are two variants of the first analog-to-digital converter ADC:

1.

With standard features

2.

With extended features for scan mode, buffered continuous mode and analog

watchdog

The second analog-to-digital converter, ADC2, contains a features subset of the first ADC

module.

Refer to the STM8A datasheet for more information on the available features.

Table 1.

Module

Features

Parameter

128 KB die based(2)

256 KB die based(2)

ADC

Resolution

10-bit

Programmable prescaler

Operating modes

Single or continuous mode

Scan and buffered

continuous mode

—

Scan and buffered

continuous mode

Clock speed

ADC input range

Conversion speed

Number of input channels

up to 10

up to 16

up to 16

Triggers

Timer 1 and external

ADC_ETR pin

External ADC_ETR

pin

Timer 1, Timer 2 and

external ADC_ETR pin

Data format

left or right alignment

ADC interrupt

EOC and AWD

EOC

EOC and AWD

Analog watchdog

Yes

—

Yes

Schmitt trigger enable/disable

Yes

Yes

Yes

Synchronization mechanism

between ADC and ADC2

——

Yes

Analog zooming

—

Through dedicated

VREF pins

Through dedicated

VREF pins