CZ miniSTM32 connection guide

• USB power input
  • USB host VBUS
  • VBUS (CN3-1)
• USB return
  • USB host ground
  • GND (CN3-5)
• Board logic rail
  • VCC (CN1-1)
  • 3.3 V measurement point

Bench checks

• Identify the USB power input and ground in the board schematic.
• Measure roughly 3.3 V between the board logic rail and ground. Check for a short or wrong connector if the rail is low.

CZ miniSTM32F103VE-EK connector map

Attach an SWD probe

• Target reference
  • VCC (CN1-1)
  • Probe VTref input
• Ground
  • GND (CN1-4)
  • Probe ground
• SWD data
  • TMS / SWDIO (CN1-7)
  • Probe SWDIO
• SWD clock
  • TCLK / SWCLK (CN1-9)
  • Probe SWCLK
• Reset
  • RESET (CN1-15)
  • Probe open-drain nRESET

Bench checks

• Check pin 1 orientation and verify each connection with the cable unplugged.
• Select the exact MCU and use a low SWD clock for the first connection.

CZ miniSTM32F103VE-EK connector map

Highlighted contacts are used in the required step or selected circuit. Select a contact to inspect it.

The maps follow the listed PCB variants. Match the board markings and connector positions to the referenced schematic before applying power.

CZ miniSTM32F103VE-EK

VE-EK uses STM32F103VET6 and J1/J2 expansion headers. The PCB has separate native and USB-to-serial connectors.

• STM32-base · CZ miniSTM32F103VE-EK· Board identification, connector numbering and documented net destinations.
• STMicroelectronics MCU datasheet· MCU electrical specifications and package pin functions.
• CZ miniSTM32F103VE-EK schematic· PCB power, debug, connector and peripheral wiring.