AN4068 datasheet(29/63 Pages) STMICROELECTRONICS

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AN4068

ST7580 reference design description

Doc ID 022923 Rev 2

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7.2

STM32 section

The EVALST7580-1 is equipped with an STM32F103CBT6 device, a medium-density ARM-

based 32-bit microcontroller.

For complete information on device characteristics, please refer to [3] and [4].

On the EVALST7580-1 board, the STM32F103CBT6 microcontroller can be used for the

following purposes:

●

to handle the ST7580 device through direct connections

●

for external access through several interface types: USB, SPI, I2C, USART, JTAG

●

to store and read data to/from an external µ-SD card

●

to develop test functions.

On the EVALST580-1, the STM32 microcontroller shares its VDD supply voltage with the

VDDIO digital supply of the ST7580 device.

A dedicated 8 MHz crystal has been provided with two suitable load capacitors according to

recommendations in [4].

7.2.1

Direct connections between STM32 microcontroller and ST7580

The STM32F103 microcontroller provides connections to the ST7580 for both digital and

analog parts.

Figure 17 is an extract of the EVALST7580-1 board and it highlights the connections

between the two devices only:

AN4068 데이터시트(PDF) 29 Page - STMicroelectronics