Spark Logic

CZ miniSTM32 connection guide

CZ miniSTM32 CZ miniSTM32F103ZE-EK wiring guide with power, signal assignments, and bench checks.

CZ miniSTM32F103VE-EK 184 contacts

CZ miniSTM32F103ZE-EK

186 contacts Current package

CZ · ZE-EK uses STM32F103ZET6 and two 50-contact J3/J4 expansion headers. Use the native USB connector CN1 when following the power scenario.

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 miniSTM32F103ZE-EK connector map

Connection scenarios

Connect a 3.3 V UART console

Use an external 3.3 V logic-level adapter and keep the board on USB power. Cross transmit and receive, share ground and match the serial framing.

Bench checks

  • Leave the adapter’s supply output disconnected.
  • Enable USART1 on PA9/PA10 and verify that the host receives a known test string.

CZ miniSTM32F103ZE-EK connector map

CZ miniSTM32F103ZE-EK wiring map

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

Header 1 · J3
Use the board connector marking and locate contact 1 before wiring.
Header 2 · J4
Use the board connector marking and locate contact 1 before wiring.
Main USB connector · CN1
Use the board connector marking and locate contact 1 before wiring.
Serial USB connector · CN3
Use the board connector marking and locate contact 1 before wiring.
JTAG header · CN2
Use the board connector marking and locate contact 1 before wiring.
SD-card connector · J1
Use the board connector marking and locate contact 1 before wiring.
TFT Header · J5
Use the board connector marking and locate contact 1 before wiring.
nRF24L01 module header · J6
Use the board connector marking and locate contact 1 before wiring.
OLED header · J8
Use the board connector marking and locate contact 1 before wiring.
Selected pin details

J4-21 · A10

Configurable I/O · GPIO

Routes to MCU PA10. Choose the applicable GPIO or peripheral function in the MCU documentation.

CZ miniSTM32F103ZE-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 miniSTM32F103ZE-EK
ZE-EK uses STM32F103ZET6 and two 50-contact J3/J4 expansion headers. Use the native USB connector CN1 when following the power scenario.