LPC2129FBD64 datasheet by NXP Semiconductors

LPC2129FBD64 Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that can be used with the internal oscillator?
  The maximum clock frequency that can be used with the internal oscillator is 60 MHz, but it's recommended to use a crystal oscillator for frequencies above 48 MHz for better accuracy and stability.
• How do I configure the pin multiplexing to use the desired peripherals?
  The pin multiplexing can be configured using the PINSELx registers, where x is the number of the port (0-2). Each PINSELx register controls the function of 4 pins. The datasheet provides a table that shows the possible functions for each pin and the corresponding PINSELx register values.
• What is the minimum voltage required for the ADC to operate correctly?
  The minimum voltage required for the ADC to operate correctly is 2.4V, but it's recommended to use a voltage of at least 2.7V for optimal performance.
• How do I implement a watchdog timer reset?
  To implement a watchdog timer reset, you need to enable the watchdog timer by setting the WDT_EN bit in the WDT_MOD register, and then periodically reset the watchdog timer by writing a specific value to the WDT_FEED register. If the watchdog timer is not reset within the timeout period, it will generate a reset signal.
• What is the maximum current that can be sourced or sunk by the GPIO pins?
  The maximum current that can be sourced or sunk by the GPIO pins is 20mA, but it's recommended to limit the current to 10mA or less to ensure reliable operation and to prevent overheating.