stm32....c-breakout

STM32....C (LQFP48 and UFQFPN48) Breakout Module

A breakout module for STM32 microcontrollers in LQFP48 and UFQFPN48 footprint.

Basic Features

• Focus on small footprint and direct access to most pins.
• 40 pins broken out, organized as two single row headers in 2.54mm pitch
• Footprints for USB-B (THT) or Micro-USB (SMT) Header
• Provides a 8 pin Micro-MaTch header for easy access to SWD and UART.
• Pushbutton for Reset (press <1 second) and starting the bootloader (press >3 seconds).
• Onboard LDO regulator (standard SOT-23-5) can be used for VDD and VDDA, just VDD or bypassed completely.
• USB VBUS (5V) is available on a pin and can be routed to the onboard LDO
• Dedicated USB disconnect function with proper pullup & disable (conforming to USB spec, not some dirty trickery)
• Use of a crystal (SMT 3.2x2.5mm) is optional.
• Options can be configured using solder bridges.
• Power LED and User LED (on PC13, PB13 or disconnected).
• Size: 25x51mm or 20x10 pins in the standard 2.54mm raster

Available pins

These pins are available on the 2.54mm headers:

• PA0 - PA12, PA15
• PB0 - PB15
• PC13 - PC15
• 5V (USB Vbus or input to the LDO regulator)
• Vdd
• Vdda
• Vbat
• NRST
• GND (2 times), also used on Vssa

These pins are also available on the Micro-MaTch:

• SWCLK, SWDIO, SWO
• NRST
• GND
• Vdd
• UART RX, UART TX (which ones can be selected via solder bridges)

These pins are not individually broken out:

• Vssa (directly connected to GND)
• PD0, PD1 (only connected to the onboard crystal pads)
• Boot0 (only connected to the reset / bootloader button)

Comparison to the popular "Blue Pill" boards

• Allows to select the STM32 model you want, even the F4 models
• Allows to select the optimal power configuration via solder bridges
• Gives access to the bootloader via button press
• USB disconnect function allows using USB based bootloaders without hassle
• Better engineered
  • Proper ESD protection for USB
  • Ferrite beads in the power traces
  • Pads for proper decoupling caps
• Conveniant development with SWD, SWO, NRST, UART on one Micro-MaTch connector
• Possible to use THT USB-B sockets which are mechanically more stable

Downside is that it is larger, Blue Pill uses 20x7 pins raster.

Some of the supported microcontrollers

• STM32F070CB
• STM32F072C8, STM32F072CB
• STM32F102C8, STM32F102CB
• STM32F103C8, STM32F103CB
• STM32F301C8
• STM32F302C8, STM32F302CB, STM32F302CC
• STM32F303C8, STM32F303CB, STM32F303CC
• STM32F334C6, STM32F334C8
• STM32F401CB, STM32F401CC, STM32F401CD, STM32F401CE
• STM32F411CC, STM32F411CE
• STM32F412CE, STM32F412CG
• STM32F413CG, STM32F413CH, STM32F423CH
• STM32L151C6-A, STM32L151C8-A, STM32L151CB-A
• STM32L152C6-A, STM32L152C8-A, STM32L152CB-A

These are just the ones that I checked for compatibility. Since ST regards pinout compatibility higly, nearly all STM32 controllers in LQFP48 and UFQFPN48 packages should work on this board.

Schematics & Layout

Schematics & Layout were done in KiCAD.

Schematics as PDF

Picture

License

This work is licensed under a Creative Commons Attribution 4.0 International License.