STM8L151C8T6 datasheet(20/129 Pages) STMICROELECTRONICS

20 / 129 page

Functional overview

STM8L15xx8, STM8L15xR6

20/129

Doc ID 17943 Rev 5

3.9

Analog-to-digital converter

●

12-bit analog-to-digital converter (ADC1) with 28 channels (including 4 fast channel),

temperature sensor and internal reference voltage

●

Conversion time down to 1 µs with fSYSCLK= 16 MHz

●

Programmable resolution

●

Programmable sampling time

●

Single and continuous mode of conversion

●

Scan capability: automatic conversion performed on a selected group of analog inputs

●

Analog watchdog: interrupt generation when the converted voltage is outside the

programmed threshold

●

Triggered by timer

Note:

ADC1 can be served by DMA1.

3.10

Digital-to-analog converter

●

12-bit DAC with 2 buffered outputs (two digital signals can be converted into two analog

voltage signal outputs)

●

Synchronized update capability using timers

●

DMA capability for each channel

●

External triggers for conversion

●

Noise-wave generation

●

Triangular-wave generation

●

Dual DAC channels with independent or simultaneous conversions

●

Input reference voltage VREF+ for better resolution

Note:

DAC can be served by DMA1.

3.11

Ultralow power comparators

The high density and medium+ density STM8L15xx devices embed two comparators

(COMP1 and COMP2) sharing the same current bias and voltage reference. The voltage

reference can be internal or external (coming from an I/O).

●

One comparator with fixed threshold (COMP1).

●

One comparator rail to rail with fast or slow mode (COMP2). The threshold can be one

of the following:

–

DAC output

–

External I/O

–

Internal reference voltage or internal reference voltage submultiple (1/4, 1/2, 3/4)

The two comparators can be used together to offer a window function. They can wake up

from Halt mode.

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