The STM32F103xx is the high performance ARM Cortex™ 32-bit RISC core operating at a 72 MHz frequency, with high speed embedded memories (Flash memory up to 128 Kbytes and SRAM up to 20 Kbytes),and an extensive range of enhanced I/Os and peripherals connected to two APB buses.
All devices offer two 12-bit ADCs, three general purpose 16-bit timers plus one PWM timer, as well as standard and advanced communication interfaces: up to two I2Cs and SPIs, three USARTs, an USB and a CAN. The devices operate from a 2.0 to 3.6 V power supply. They are available in both the –40 to+85 °C temperature range and the –40 to +105 °C extended temperature range.
2.what type programmar need it
3.hoe to burn 100 or 144 pin avr mcu
I think R-PI is a better choise.