STM32F103RCT6 ARM Development Board

Description and specifications:

• 32-bit ARM Cortex M3 processor;
• Flash memory: 256 kB;
• SRAM memory: 48KB;
• Supply voltage: 2-3.6V;
• Sleep mode, stop, standby;
• 7-channel DMA: timer, ADC, SPI, I2C, USART;
• SWD and JTAGM interface
• Calibrated oscillator - 8MHz, RC - 40kHz, RTC - 32kHz;
• Reset: power on / off, PVD (for voltage monitoring);
• Two 12-bit analog-to-digital converters with 1 microsecond conversion time (max. 21 inputs, 0-3.6V);
• 51-pin I / O bidirectional;
• Tolerates 5V signal;
• 16-bit PWM for engine control (dead-zone, emergency brake);
• CAN Interface (2.0B);
• Full-speed USB 2.0 interface.

As can be seen from the specs, this plaque offers many features, lots of I / O pins, all at a discounted price.