Features
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Bluetooth 5.3 Low Energy (LE) support
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Compact form factor with dual 12-pin I/O headers
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Onboard 3.3V LDO regulator with power protection
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USB connectivity with reverse current and surge protection
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Dual crystal system for accurate timing (HSE + LSE)
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Reset and Boot control buttons
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Ideal for low-power applications and educational use.
Specifications
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Clock System:
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32 MHz high-speed passive crystal (HSE)
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32.768 kHz low-speed passive crystal (LSE)
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Power Supply:
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Input Voltage: 3.3V to 5.5V
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Onboard 3.3V LDO (100 mA max output)
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USB power protected by diode and TVS for surge and reverse current
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Interfaces:
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Two 12-pin headers (2.54 mm pitch) for GPIO and peripheral expansion
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Control Buttons:
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Reset Button (connected to B23)
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Boot Button (connected to B22)
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Wireless Communication:
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Bluetooth 5.3 Low Energy (LE)
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Applications
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Embedded system prototyping
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IoT device development
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Bluetooth-based automation and sensing
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Low-power data logging
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Educational projects in microcontroller and SoC design