MC9S08AC128MLKE datasheet by Freescale Semiconductor

MC9S08AC128MLKE Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the MC9S08AC128MLKE?
  The maximum operating frequency of the MC9S08AC128MLKE is 20 MHz.
• How do I configure the clock source for the MCU?
  The clock source can be configured using the CLKSEL register. The MCU can be clocked from an internal clock source (IRC), an external clock source (EXTAL), or a crystal oscillator (XTAL). The clock source is selected by writing the appropriate value to the CLKSEL register.
• What is the purpose of the COP (Computer Operating Properly) module?
  The COP module is a watchdog timer that monitors the MCU's operation and resets the MCU if it fails to periodically refresh the COP timer. This ensures that the MCU is operating properly and prevents it from getting stuck in an infinite loop or other abnormal condition.
• How do I use the ADC (Analog-to-Digital Converter) module?
  The ADC module can be used to convert analog signals to digital values. The ADC module is configured using the ADCSC1 and ADCSC2 registers. The ADC conversion is triggered by writing a 1 to the ADGO bit in the ADCSC1 register. The converted digital value can be read from the ADCRH and ADCRL registers.
• What is the purpose of the SCI (Serial Communication Interface) module?
  The SCI module is a serial communication interface that allows the MCU to communicate with other devices using a serial protocol such as UART, SPI, or I2C. The SCI module can be used for serial communication, debugging, and programming.