MC9S08AC128CFUE datasheet by Freescale Semiconductor

MC9S08AC128CFUE Frequently Asked Questions (FAQs)

• What is the maximum clock frequency of the MC9S08AC128CFUE?
  The maximum clock frequency of the MC9S08AC128CFUE is 20 MHz.
• How do I configure the internal oscillator on the MC9S08AC128CFUE?
  The internal oscillator on the MC9S08AC128CFUE can be configured using the OSCCLK and OSCST registers. The OSCCLK register sets the oscillator clock frequency, and the OSCST register sets the oscillator start-up time.
• What is the purpose of the COP (Computer Operating Properly) watchdog timer on the MC9S08AC128CFUE?
  The COP watchdog timer on the MC9S08AC128CFUE is used to monitor the operation of the microcontroller and reset it if it fails to respond within a specified time period. This helps to prevent the microcontroller from getting stuck in an infinite loop or other abnormal operation.
• How do I use the ADC (Analog-to-Digital Converter) on the MC9S08AC128CFUE?
  The ADC on the MC9S08AC128CFUE can be used to convert analog signals to digital values. To use the ADC, configure the ADCSC1 and ADCSC2 registers to select the analog input channel, set the conversion mode, and trigger the conversion. The ADC result can be read from the ADCRH and ADCRL registers.
• What is the purpose of the SCI (Serial Communication Interface) on the MC9S08AC128CFUE?
  The SCI on the MC9S08AC128CFUE is a serial communication interface that allows the microcontroller to communicate with other devices using asynchronous serial communication protocols such as UART, SPI, and I2C.