P89LPC935FA,129 datasheet by NXP Semiconductors

P89LPC935FA,129 Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that can be used with the P89LPC935FA,129?
  The maximum clock frequency is 12 MHz, but it can be overclocked up to 18 MHz with some limitations.
• How do I configure the oscillator settings for the P89LPC935FA,129?
  The oscillator settings can be configured using the OSCCFG register. The register settings depend on the crystal frequency and the desired clock frequency.
• What is the purpose of the watchdog timer in the P89LPC935FA,129?
  The watchdog timer is used to reset the microcontroller in case of a software fault or a system crash. It can be enabled or disabled using the WDTE bit in the WDTMOD register.
• How do I use the UART interface in the P89LPC935FA,129?
  The UART interface can be used for serial communication. The UART settings can be configured using the UCFG register, and the transmit and receive data can be accessed using the UART data registers.
• What is the maximum current that can be sourced or sunk by the GPIO pins of the P89LPC935FA,129?
  The maximum current that can be sourced or sunk by the GPIO pins is 20 mA per pin, with a total current limit of 100 mA for all pins combined.