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STM32F103RB USB to UART SPI I2C

Stulinaz·STM32F103RB_USB_to_UART_SPI_I2C·KICAD/STM32_MULTIPROTOCOL.kicad_pcb

STM32F103RB USB to UART SPI I2C PCB layout, top view — open source STM32 board by Stulinaz
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About the STM32F103RB USB to UART SPI I2C PCB

STM32F103RB USB to UART SPI I2C is an open source STM32 PCB design by Stulinaz, published on GitHub. It is a 2-layer board measuring 80 × 80 mm, with 67 components from 23 distinct parts.

Its main chip is the STM32F103R8Tx, from the STM32 family. Other key parts include the MIC39100-3.3WS, MIC4427 and M24C02-WMN. By type, the board carries 26 resistors, 12 capacitors, 4 ICs and 2 crystals.

It belongs with the usb & debug tools designs in this gallery.

From the project

Firmware and Kicad project for my USB to UART/I2C/SPI converter

Based on the popular microcontroller STM32F103RBT6 and a custom PCB board. This project is an embedded software/hardawe solutions that allows you to transfer data from USB to all the main digital interfaces - UART, I2C and SPI. This board will help you to analyze and debug all the main digital and analog IC’s as well as lot of IOT and RF demoboard, saving you the time to develop a custom firmware , or buying expensive data converters.

STM32F103RB USB to UART SPI I2C, from the project README
From the project README

Main components on the STM32F103RB USB to UART SPI I2C

MIC39100-3.3WSSTM32F103R8TxMIC4427M24C02-WMN

STM32F103RB USB to UART SPI I2C bill of materials (BOM)

67 components, 23 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MIC39100-3.3WS
U1
1
STM32F103R8Tx
U2
1
MIC4427
U3
1
M24C02-WMN
U4
1
Crystal
Y1
1
Crystal_GND24
Y2
4
22pF
CF1, CF2, CF3, CF4
9
LED
ERROR1, I2C1, RX1, SER1, SPI1, STNDBY1, TIMEOUT1, TX1 +1
1
USBLC6-2SC6
ESD1
1
ESDA6V1BC6
ESD2
5
Conn_01x04
I2C_OUT1, PWR1, PWR_OUT1, SPI_OUT1, UART_OUT1
1
Conn_01x06
PROG1
1
Conn_01x03
PWR_SEL1
1
USB_B_Mini
USB1
9
100nF
C0, C1, C4, C5, C6, C7, C8, C10 +1
1
1uF
C2
2
10uF
C3, C9
1
100k
R1
4
1k
R2, R3, R4, R5
4
10k
R6, R7, R25, R26
Show 3 more
QtyPartRefs
14
100R
R8, R9, R10, R11, R12, R13, R14, R15 +6
2
10kR
R22, R23
1
1.5k
R24

STM32F103RB USB to UART SPI I2C design files

The KiCad project lives in the Stulinaz/STM32F103RB_USB_to_UART_SPI_I2C repository on GitHub; these links point at the commit this page was built from.

STM32F103RB USB to UART SPI I2C: common questions

What microcontroller does the STM32F103RB USB to UART SPI I2C use?

The STM32F103RB USB to UART SPI I2C is built around the STM32F103R8Tx, from the STM32 family.

How big is the STM32F103RB USB to UART SPI I2C PCB?

The STM32F103RB USB to UART SPI I2C measures 80 × 80 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the STM32F103RB USB to UART SPI I2C?

67 components, from 23 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the STM32F103RB USB to UART SPI I2C design files?

From the Stulinaz/STM32F103RB_USB_to_UART_SPI_I2C repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the STM32F103RB USB to UART SPI I2C design in my own project?

The repository has no license, so all rights stay with Stulinaz. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the STM32F103RB USB to UART SPI I2C without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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