AN4080 datasheet(26/35 Pages) STMICROELECTRONICS

26 / 35 page

Reference design

AN4080

26/35

DocID023035 Rev 4

Reference design

6.1

Description

The reference design shown in Figure 11, introduces the STM32F051, a highly integrated

microcontroller running at 48 MHz, that combines the Cortex®-M0 32-bit RISC CPU core

with 64 Kbytes of embedded Flash memory and 8 Kbytes of SRAM

For the STM32F058 reference design, refer to Figure 12. These reference design can be

tailored to any other STM32F058 device with a different package, using the pin

correspondence given in the corresponding datasheet.

For the STM32F072 reference design, refer to Figure 13. These reference design can be

tailored to any other STM32F072 device with a different package, using the pin

correspondence given in the corresponding datasheet.

6.1.1

Clock

Two clock sources are used for the microcontroller:

•

HSE: X1– 8 MHz crystal for the STM32F0xx microcontroller

•

LSE: X2– 32.768 kHz crystal for the embedded RTC

Refer to Section 2: Clocks on page 15.

6.1.2

Reset

The reset signal in Figure 11 or Figure 12 is active low. The reset sources include:

•

Reset button (B1)

•

Debugging tools via the connector CN1

Refer to Section 1.2.3: System reset on page 12.

6.1.3

STM32F0x8 power-on reset

On the STM32F0x8 line, the power-on reset signal is active low and must be provided

externally by the application on NPOR pin. It is maintained to VDDA through an integrated

pull-up resistor.

Refer to Section 1.2.2: External power-on reset and power-down reset (NPOR) of the

STM32F0x8 devices on page 11.

6.1.4

Boot mode

The boot option is configured by setting BOOT0 through switch SW1 and option bit

nBOOT1. Refer to Section 3: Boot configuration on page 20.

6.1.5

SWD interface

The reference design shows the connection between the STM32F0xx and a standard SWD

connector. Refer to Section 4: Debug management on page 22.

Note:

It is recommended to connect the reset pin in order to be able to reset the application from

the tool.

AN4080 Datasheet(PDF) 26 Page - STMicroelectronics

AN4080 Datasheet(HTML) 26 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35

Datasheet Download

Link URL