STM32F103C8T6 64K flash 20K SRAM ARM Cortex-M3 Microcontroller

Description

STM32F103C8T6 64K flash 20K SRAM ARM Cortex-M3 Microcontroller

Key Specifications

Core: ARM® Cortex®-M3 32-bit RISC Core

1. Memory

• Flash Memory: 64KB (0x0800 0000 – 0x0800 FFFF)
• SRAM: 20KB (16KB Main + 4KB Core-Coupled Memory)
• Boot Memory: 2KB (System Loader)

2. CPU Performance

• Clock Speed: 72 MHz max (0 wait states @ 72MHz)
• DMIPS: 1.25 DMIPS/MHz (~90 DMIPS @ 72MHz)
• Single-Cycle Multiplication & Hardware Division

3. Power & Voltage

• Operating Voltage: 2.0V – 3.6V
• Current Consumption:
  • Run Mode: ~36mA @ 72MHz
  • Stop Mode: ~20µA (RTC running)
  • Standby Mode: ~2µA

4. GPIO & Peripherals

• GPIO Pins: 37 (LQFP48 package)
• Communication Interfaces:
  • USART: 3x
  • SPI: 2x (18Mbps)
  • I2C: 2x (Fast Mode @ 400kHz)
  • USB 2.0 Full-Speed (w/ internal PHY)
• Timers:
  • 16-bit: 4x (PWM, input capture)
  • 32-bit: 2x
  • SysTick Timer
• ADC: 2x 12-bit (1µs conv. time, 16 ch.)
• DAC: None

5. Debug & Programming

• Debug Interfaces:
  • SWD (Serial Wire Debug)
  • JTAG (4/5-pin)
• Boot Modes:
  • Flash (default)
  • System Memory (for USB DFU)
  • Embedded SRAM

6. Package & Pins

• Package: LQFP48 (7x7mm, 0.5mm pitch)
• Pin Count: 48 (37 usable GPIOs)

7. Operating Conditions

• Temperature Range:
  • Industrial: -40°C to +85°C
  • Extended: -40°C to +105°C
• ESD Protection: ≥2kV (HBM)

8. Development Tools

• IDEs: Keil MDK, IAR Embedded Workbench, STM32CubeIDE
• Programmers: ST-Link, J-Link
• Common Boards: “Blue Pill” (STM32F103C8T6 breakout)

9. Applications

• Industrial control
• Consumer electronics
• IoT edge devices
• Motor control
• USB HID (keyboards, gamepads)

10. Manufacturer Part Numbers

• STM32F103C8T6 (64KB Flash, LQFP48)
• Alternatives:
  • STM32F103CBT6 (128KB Flash)
  • STM32F103R8T6 (64KB, LQFP64)

Design Notes

1. Decoupling: Use 100nF + 4.7µF caps near VDD.
2. Reset Circuit: 10kΩ pull-up + 100nF cap recommended.
3. Boot Pins: BOOT0 must be pulled low for normal operation.