AN4444 datasheet(39/68 Pages) STMICROELECTRONICS

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AN4444

ST7590 reference design description

8.2.2

Digital interfaces to STM32

The EVALKITST7590-Q1 allows accessing the STM32F103RGT7 microcontroller via its

available interfaces:



Serial wire/JTAG debug , that enables either a serial wire debug or a JTAG compliant

debug through a JTAG1 connector



USB 2.0 full speed through a mini-USB CN4 connector



2 SPI interfaces:

–

One is used to access an external µSD card with FAT32 support through a µSD

CN3 connector

–

The second one works at 18 Mbit/s and presents the SPI signals at a J1 strip

connector.



I2C



A second UART (TXD and RXD signals), besides the one used for ST7590

connections

I2C and UART signals are accessible through the same double strip connector J2.

The NRST signal is externally accessible through a push-button.

8.2.3

Metrology interface to STM32

The EVALKITST7590-Q1 provides a free STM32 SPI interface at a J1 strip connector. This

SPI is available for connection to STPMxx metrology boards. Note that DIP switches must

be opened when a metrology board is connected.

8.2.4

General purpose push-buttons and LEDs

The EVALKITST7590-Q1 provides configurable input and output connections to the

STM32F103 microcontroller for both externally generated events and signaling purposes. In

fact, the board presents:



3 signaling LEDs, connected to PB5, PB6, PB7 outputs



2 push-buttons connected to PB10, PB11, to generate manually events triggering

programmable functions.

AN4444 Datasheet(PDF) 39 Page - STMicroelectronics

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