P89LPC935FDH,518 datasheet by NXP Semiconductors

P89LPC935FDH,518 Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that can be used with the P89LPC935FDH?
  The maximum clock frequency for the P89LPC935FDH is 12 MHz, but it can be overclocked up to 18 MHz with some limitations.
• How do I configure the oscillator for the P89LPC935FDH?
  The oscillator can be configured using the OSCCFG register. The oscillator frequency can be set to either 12 MHz or 18 MHz, and the oscillator mode can be set to either internal or external.
• What is the purpose of the watchdog timer in the P89LPC935FDH?
  The watchdog timer is used to reset the microcontroller if it becomes stuck in an infinite loop or if there is a software fault. It can be enabled or disabled using the WDTE bit in the WDTMOD register.
• How do I use the UART in the P89LPC935FDH?
  The UART can be used for serial communication. The UART is configured using the UART registers, and the baud rate can be set using the UARTBRL and UARTBRH registers. The UART can be used in asynchronous mode or synchronous mode.
• What is the purpose of the brown-out detection (BOD) in the P89LPC935FDH?
  The brown-out detection (BOD) is used to detect when the voltage supply drops below a certain threshold. If the voltage supply drops below the threshold, the microcontroller will reset. The BOD can be enabled or disabled using the BODEN bit in the BODCON register.