STMicroelectronics STM32F103RET6, 32bit ARM Cortex M3 Microcontroller, STM32F, 72MHz, 512 kB Flash, 64-Pin LQFP
Technical Datasheet: 
STM32F103 Series Microcontrollers, STMicroelectronics
STMicroelectronics devices STM32F103 Cortex-M3 core with 72 MHz CPU speed and up to 1 MB of Flash. Comprising of motor control peripherals plus CAN and USB full speed interfaces. The STM32 series ARM Cortex-M3 32 bit Flash microcontroller operates low power, low voltage and combines great performance with real time capabilities. In a range of package types available for your embedded application. The MCU architecture has an easy to use STM32 platform and will work in applications including motor drives; PC and gaming; HVAC and Industrial applications.
32-bit RISC
Pin to pin software compatible
SRAM up to 96 Kb
Flash up to 1MB
Power Supply: 2 V to 3.6 V
Temperature ranges: -40 to +85 °C or -40 to +105 °C
STM32F1 Series 32-Bit ARM® Cortex®-M3 Microcontrollers, STMicroelectronics
The STM32 family of 32-bit Flash Microcontrollers is based on the breakthrough ARM Cortex™-M3 core - a core specifically developed for embedded applications. The STM32 family benefits from the Cortex™-M3 architectural enhancements including the Thumb-2 instruction set to deliver improved performance with better code density, significantly faster response to interrupts, all combined with industry leading power consumption.
Benefits
• Excellent real-time behaviour
• Oustanding power efficiency
• Superior and innovative peripherals
• Maximum integration
• Cross family pin-to-pin, peripheral and software compatibility
Specifications
| Attribute | Value |
| Family Name | STM32F |
| Package Type | LQFP |
| Mounting Type | Surface Mount |
| Pin Count | 64 |
| Device Core | ARM Cortex M3 |
| Data Bus Width | 32bit |
| Program Memory Size | 512 kB |
| Maximum Frequency | 72MHz |
| RAM Size | 64 kB |
| USB Channels | 1 x Device |
| Number of PWM Units | 2 |
| ADC Channels | 16 |
| Number of SPI Channels | 3 |
| Typical Operating Supply Voltage | 2 → 3.6 V |
| Number of CAN Channels | 1 |
| Instruction Set Architecture | RISC |
| PWM Resolution | 16bit |
| Minimum Operating Temperature | -40 °C |
| Timers | 6 x 16 bit |
| Maximum Number of Ethernet Channels | 0 |
| Number of PCI Channels | 0 |
| Number of I2C Channels | 2 |
| Number of Timers | 6 |
| Number of Ethernet Channels | 0 |
| Number of UART Channels | 0 |
| Program Memory Type | Flash |
| Pulse Width Modulation | 2 (16 bit) (Motor Control) |
| Dimensions | 10.2 x 10.2 x 1.45mm |
| ADC Resolution | 12bit |
| Number of USART Channels | 5 |
| Width | 10.2mm |
| Number of LIN Channels | 0 |
| Height | 1.45mm |
| Number of ADC Units | 3 |
| Maximum Operating Temperature | +85 °C |
| Length | 10.2mm |
| ADCs | 3(16 x 12 bit) |
| Timer Resolution | 16bit |