STM8L15 datasheet(18/122 Pages) STMICROELECTRONICS

No de pièce	STM8L15

Description	8-bit ultralow power MCU, up to 32 KB Flash, 1 KB Data EEPROM RTC, LCD, timers, USART, I2C, SPI, ADC, DAC, comparators

PDF	122 Pages

Scroll/Zoom	100%

Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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18 / 122 page

Functional overview

STM8L151xx, STM8L152xx

18/122

Doc ID 15962 Rev 5

Figure 2.

STM8L15x clock tree diagram

The HSE clock source can be either an external crystal/ceramic resonator or an external source (HSE

bypass). Refer to Section HSE clock in the STM8L15x reference manual (RM0031).

The LSE clock source can be either an external crystal/ceramic resonator or a external source (LSE

bypass). Refer to Section LSE clock in the STM8L15x reference manual (RM0031).

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

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