P89LPC9321FA,112 datasheet by NXP Semiconductors

P89LPC9321FA,112 Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that can be used with the P89LPC9321FA,112?
  The maximum clock frequency for the P89LPC9321FA,112 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,112?
  The oscillator can be configured using the OSCCFG register. The register settings depend on the crystal frequency and the desired clock frequency. Refer to the application note AN10216 for more information.
• What is the minimum voltage required for the P89LPC9321FA,112 to operate?
  The minimum operating voltage for the P89LPC9321FA,112 is 2.4 V, but it is recommended to use a minimum of 2.7 V for reliable operation.
• How do I use the UART on the P89LPC9321FA,112?
  The UART on the P89LPC9321FA,112 is a standard 16450-compatible UART. It can be configured using the U0CSR and U0BAUD registers. Refer to the datasheet and the 8051 UART documentation for more information.
• Can I use the P89LPC9321FA,112 with a 5V power supply?
  No, the P89LPC9321FA,112 is a 3.3V device and should not be used with a 5V power supply. Using a 5V power supply can damage the device.