... of processing and extensionCPU frequency is nearly 200M, 32-bit, 64M RAM, 512K flash, expanding application of the four UART ports, two ... SPI ports, one I2C port, 9 channel of PWM input, output, 24-bit ... 2 flight, the PID parameters is recorded in the flash memory.8-channel Input/output PWM signal for controlling the steering gear3 ...