P89LPC9321FA,529 datasheet by NXP Semiconductors

P89LPC9321FA,529 Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that can be used with the P89LPC9321FA,529?
  The maximum clock frequency for the P89LPC9321FA,529 is 3.875 MHz, but it can be overclocked up to 4 MHz with some limitations.
• How do I configure the oscillator for the P89LPC9321FA,529?
  The oscillator can be configured using the OSCCFG register. The oscillator frequency can be set to either 3.625 MHz or 3.875 MHz, and the oscillator mode can be set to either XTAL or RC.
• What is the purpose of the watchdog timer in the P89LPC9321FA,529?
  The watchdog timer is used to reset the microcontroller if it becomes stuck in an infinite loop or if it fails to respond within a certain time period. This is useful for ensuring system reliability and preventing system crashes.
• How do I use the UART in the P89LPC9321FA,529?
  The UART can be used for serial communication with other devices. The UART is configured using the UCFG register, and data is transmitted and received using the UTXH and UTHR registers.
• What is the maximum current that can be sourced or sunk by the I/O pins of the P89LPC9321FA,529?
  The maximum current that can be sourced or sunk by the I/O pins of the P89LPC9321FA,529 is 20 mA.