C0-Nano

Pinout: [PDF] [SVG] [PNG]

Note: I2C hardware peripheral assignment at PA6/7 differs from ATMega-based Nano boards.
However, in common use-cases a bitbanging I2C implementation often is easier to use than a hardware I2C peripheral.

Specifications

• Simple, very low cost (2L, all parts on top of PCB)
• Builtin USB (DFU) bootloader
• Full-speed USB, no crystal needed
  (using the Clock Recovery System (CRS))
• 48MHz ARM® Cortex®-M0+ with 24KB SRAM and 128KB Flash memory
• 23+2 GPIOs with 2x SPIs, 2x UARTs, 2x I2C and lots of timer channels
• 9 analog input channels, internal voltage reference
• Fast 2.5MSps 12-bit Analog-to-digital converter (ADC)
• 2x user LEDs (not shared with other GPIOs)

BOM

Part	€ @Qty=100
STM32C071KBT6	0.8783
AP7313-33SRG1	0.1235
PMEG2010EH/ER1	0.0453
ESD5V3U2U2	0.2600
USB-C (USB4105)	0.4890
PCB	~0.5
6x 4.7uF/10V (0402)
1x 0.1uF (0402)
5x 5.1kΩ (0402)
3x LEDs (0603)
Sum:	~3€

(not including VAT and pin headers 🙂)

¹) or similar
²) USB DM/DP ESD protection (optional)

Resources

• Schematics (PDF)
• Interactive BOM
• KiCad Design Files
• libopencm3-fork with STM32C0 support
• Demo firmware with USB ACM device and blinkenlights

Contact