STM8L051F3 datasheet(18/96 Pages) STMICROELECTRONICS

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Functional overview

STM8L051F3

18/96

DS9178 Rev 4

3.5

Low power real-time clock

The real-time clock (RTC) is an independent binary coded decimal (BCD) timer/counter.

Six byte locations contain the second, minute, hour (12/24 hour), week day, date, month,

year, in BCD (binary coded decimal) format. Correction for 28, 29 (leap year), 30, and 31

day months are made automatically.

It provides a programmable alarm and programmable periodic interrupts with wakeup from

Halt capability.

•

Periodic wakeup time using the 32.768 kHz LSE with the lowest resolution (of 61 µs) is

from min. 122 µs to max. 3.9 s. With a different resolution, the wakeup time can reach

36 hours

•

Periodic alarms based on the calendar can also be generated from every second to

every year

3.6

Memories

STM8L051F3 as all the low density value line STM8L05xxx devices have the following main

features:

•

Up to 1 Kbyte of RAM

•

The non-volatile memory is divided into three arrays:

–

8 Kbytes of low-density embedded Flash program memory

–

256 bytes of Data EEPROM

–

Option bytes

The EEPROM embeds the error correction code (ECC) feature.

The option byte protects part of the Flash program memory from write and readout piracy.

3.7

DMA

A 4-channel direct memory access controller (DMA1) offers a memory-to-memory and

peripherals-from/to-memory transfer capability. The 4 channels are shared between the

following IPs with DMA capability: ADC1, I2C1, SPI1, USART1, and the three timers.

3.8

Analog-to-digital converter

•

12-bit analog-to-digital converter (ADC1) with 10 channels (no fast channel) 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

•

Triggered by timer

Note:

ADC1 can be served by DMA1.

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