... four UART ports, two SPI ports, one I2C port, 9 channel of PWM input, output, 24-bit high precision AD and ... flight, the PID parameters is recorded in the flash memory.8-channel Input/output PWM signal for controlling the steering gear3 PWM ... A/D for voltage monitor 2 channel frequency monitor for RPM1 channel for fuel tank monitoring 1 channel for engine temperature monitoring Every ...