MC908JB8FBE datasheet by Freescale Semiconductor

MC908JB8FBE Frequently Asked Questions (FAQs)

• What is the recommended oscillator crystal frequency for this microcontroller?
  The recommended oscillator crystal frequency for the MC908JB8FBE is 4 MHz or 8 MHz, depending on the application requirements.
• How do I configure the internal clock source?
  The internal clock source can be configured using the CLKSEL register. The clock source can be selected from the internal oscillator, external oscillator, or the PLL clock.
• What is the maximum clock frequency that can be achieved with the PLL?
  The maximum clock frequency that can be achieved with the PLL is 32 MHz, depending on the input clock frequency and the PLL multiplier settings.
• How do I enable the watchdog timer?
  The watchdog timer can be enabled by setting the WDE bit in the WDTCSR register. The watchdog timer period can be set using the WDP bits in the WDTCSR register.
• What is the purpose of the COP (Computer Operating Properly) module?
  The COP module is a watchdog timer that monitors the microcontroller's operation and resets the device if it fails to periodically refresh the COP timer.