This page provides the complete STM32F103C8T6 Blue Pill Pinout diagram including all GPIO pin assignments and alternate functions. The STM32F103C8T6 is an ARM Cortex-M3 microcontroller running at up to 72 MHz with 64KB flash and 20KB RAM. The diagram includes PWM, SPI, I2C, UART, ADC, and CAN pin assignments with 5V tolerant and 3.3V standard pin indicators.
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