MCF51JM32VQH datasheet by Freescale Semiconductor

MCF51JM32VQH Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the MCF51JM32VQH?
  The maximum operating frequency of the MCF51JM32VQH is 50 MHz.
• How do I configure the clock source for the MCF51JM32VQH?
  The clock source for the MCF51JM32VQH can be configured using the System Integration Module (SIM) registers. The SIM_CLKDIV register controls the clock divider, and the SIMOSC32 register controls the 32 kHz oscillator.
• What is the purpose of the COP (Computer Operating Properly) module in the MCF51JM32VQH?
  The COP module is a watchdog timer that monitors the microcontroller's operation and resets the device if it fails to respond within a specified time period. This helps prevent the device from getting stuck in an infinite loop or other abnormal operation.
• How do I use the DMA (Direct Memory Access) controller in the MCF51JM32VQH?
  The DMA controller in the MCF51JM32VQH can be used to transfer data between peripherals and memory without CPU intervention. This is done by configuring the DMA channel registers, setting up the transfer parameters, and enabling the DMA channel.
• What is the difference between the various low-power modes in the MCF51JM32VQH?
  The MCF51JM32VQH has several low-power modes, including Stop, Wait, and Doze. Stop mode disables the CPU and most peripherals, while Wait mode disables the CPU but keeps some peripherals active. Doze mode reduces the CPU clock frequency to conserve power.