MCF51JM64VLK datasheet by Freescale Semiconductor

MCF51JM64VLK Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the MCF51JM64VLK?
  The maximum operating frequency of the MCF51JM64VLK is 50 MHz, but it can be overclocked to 60 MHz with reduced voltage and temperature ranges.
• How do I configure the clock source for the MCF51JM64VLK?
  The clock source for the MCF51JM64VLK can be configured using the SYNR and REFS bits in the System Options Register (SOR). The clock source can be set to either the internal fast internal RC oscillator (FIRC), the slow internal RC oscillator (SIRC), or an external clock source.
• What is the purpose of the Low-Voltage Detect (LVD) module in the MCF51JM64VLK?
  The LVD module in the MCF51JM64VLK is used to detect when the voltage supply falls below a certain threshold, and can be used to generate a reset or interrupt to the processor. This is useful for preventing data corruption or system malfunction in low-voltage conditions.
• How do I use the DMA controller in the MCF51JM64VLK?
  The DMA controller in the MCF51JM64VLK can be used to transfer data between peripherals and memory without CPU intervention. The DMA controller is configured using the DMA Control Register (DMACR) and the DMA Request Register (DMARQ). The DMA channel priority and transfer size can be set using the DMA Channel Configuration Register (DMACCR).
• What is the maximum amount of current that can be sourced or sunk by the GPIO pins of the MCF51JM64VLK?
  The maximum amount of current that can be sourced or sunk by the GPIO pins of the MCF51JM64VLK is 25 mA per pin, with a total current limit of 100 mA for all GPIO pins combined.