STM32L072KZ datasheet(24/160 Pages) STMICROELECTRONICS

Nome de Peças	STM32L072KZ

Descrição Electrónicos	Ultra-low-power 32-bit MCU Arm®-based Cortex®-M0, up to 192KB Flash, 20KB SRAM, 6KB EEPROM, USB, ADC, DACs

PDF	160 Pages

Scroll/Zoom	100%

Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

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24 / 160 page

Functional overview

STM32L072xx

24/160

DS10689 Rev 5

•

Startup clock

After reset, the microcontroller restarts by default with an internal 2.1 MHz clock (MSI).

The prescaler ratio and clock source can be changed by the application program as

soon as the code execution starts.

•

Clock security system (CSS)

This feature can be enabled by software. If an HSE clock failure occurs, the master

clock is automatically switched to HSI and a software interrupt is generated if enabled.

Another clock security system can be enabled, in case of failure of the LSE it provides

an interrupt or wakeup event which is generated if enabled.

•

Clock-out capability (MCO: microcontroller clock output)

It outputs one of the internal clocks for external use by the application.

Several prescalers allow the configuration of the AHB frequency, each APB (APB1 and

APB2) domains. The maximum frequency of the AHB and the APB domains is 32 MHz. See

Figure 2 for details on the clock tree.

STM32L072KZ Folha de dados(PDF) 24 Page - STMicroelectronics