Spark Logic

CZ miniSTM32 connection guide

CZ miniSTM32 CZ miniSTM32F103VE-EK wiring guide with power, signal assignments, and bench checks.

CZ miniSTM32F103VE-EK

184 contacts Current package
CZ miniSTM32F103ZE-EK 186 contacts

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

Power the board from USB

Required

Use a single USB cable to power the board through its native connector. Leave external power headers disconnected. Check the 3.3 V rail before attaching the debug probe.

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

Connection scenarios

Attach an SWD probe

Use the USB supply from the required step. Configure the probe for a powered 3.3 V target. Connect the probe’s reference input to the board logic rail, then wire SWDIO, SWCLK and ground.

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

CZ miniSTM32F103VE-EK wiring map

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

Header 1 · J1
Use the board connector marking and locate contact 1 before wiring.
Header 2 · J2
Use the board connector marking and locate contact 1 before wiring.
Main USB connector · CN3
Use the board connector marking and locate contact 1 before wiring.
Serial USB connector · CN4
Use the board connector marking and locate contact 1 before wiring.
JTAG header · CN1
Use the board connector marking and locate contact 1 before wiring.
SD-card connector · CN2
Use the board connector marking and locate contact 1 before wiring.
TFT LCD header · J3
Use the board connector marking and locate contact 1 before wiring.
nRF24L01 module header · J8
Use the board connector marking and locate contact 1 before wiring.
ESP-1 module header · J9
Use the board connector marking and locate contact 1 before wiring.
Selected pin details

J1-38 · PD9

Configurable I/O · GPIO

Routes to MCU PD9. Choose the applicable GPIO or peripheral function in the MCU documentation.

CZ miniSTM32F103VE-EK connector map

Electrical limits · Pin in the reference

Models and documents

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.