MC68HC11E0CFNE2R datasheet by Freescale Semiconductor

MC68HC11E0CFNE2R Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that can be used with the MC68HC11E0CFNE2R?
  The maximum clock frequency for the MC68HC11E0CFNE2R is 4 MHz, but it can be overclocked up to 6 MHz with some limitations.
• How do I configure the MC68HC11E0CFNE2R for low-power operation?
  To configure the MC68HC11E0CFNE2R for low-power operation, set the Clock Mode Register (CMR) to select the low-power clock mode, and use the Stop Mode (STP) or Wait Mode (WT) to reduce power consumption.
• What is the maximum amount of RAM and EEPROM that can be used with the MC68HC11E0CFNE2R?
  The MC68HC11E0CFNE2R has 512 bytes of on-chip RAM and 512 bytes of on-chip EEPROM. However, it can be expanded up to 64 KB of external RAM and 64 KB of external EEPROM using external memory interfaces.
• How do I implement a watchdog timer on the MC68HC11E0CFNE2R?
  The MC68HC11E0CFNE2R has a built-in watchdog timer that can be enabled by setting the Watchdog Timer Control Register (WTCSR). The watchdog timer can be configured to reset the microcontroller if it does not receive a refresh signal within a specified time period.
• What are the limitations of the MC68HC11E0CFNE2R's analog-to-digital converter (ADC)?
  The MC68HC11E0CFNE2R's ADC has a resolution of 8 bits and can convert analog signals in the range of 0 to 5 volts. However, it has a limited sampling rate and may not be suitable for high-speed or high-precision applications.