P89LPC9321FDH,512 datasheet by NXP Semiconductors

P89LPC9321FDH,512 Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that can be used with the P89LPC9321FDH,512?
  The maximum clock frequency for the P89LPC9321FDH,512 is 3.875 MHz, but it can be overclocked up to 4 MHz with some limitations.
• How do I configure the oscillator for the P89LPC9321FDH,512?
  The oscillator can be configured using the OSCCFG register. The oscillator frequency can be set to either 3.875 MHz or 3.072 MHz, and the oscillator mode can be set to either XTAL or RC.
• What is the minimum voltage required for the P89LPC9321FDH,512 to operate?
  The minimum voltage required for the P89LPC9321FDH,512 to operate is 2.4V, but it is recommended to use a voltage of at least 2.7V for reliable operation.
• How do I use the UART on the P89LPC9321FDH,512?
  The UART on the P89LPC9321FDH,512 can be used by configuring the UART registers (U0CSR, U0GCR, U0BAUD) and using the UART interrupts. The UART can operate at baud rates up to 115200 bps.
• Can I use the P89LPC9321FDH,512 with an external crystal oscillator?
  Yes, the P89LPC9321FDH,512 can be used with an external crystal oscillator. The external crystal oscillator can be connected to the XTAL1 and XTAL2 pins, and the oscillator frequency can be set using the OSCCFG register.