P89LPC9321FN,112 datasheet by NXP Semiconductors

P89LPC9321FN,112 Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that can be used with the P89LPC9321FN,112?
  The maximum clock frequency for the P89LPC9321FN,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 P89LPC9321FN,112?
  The oscillator can be configured using the OSCCFG register. The oscillator frequency can be selected by setting the appropriate values for the OSCCFG register bits OSCFREQ[2:0].
• What is the purpose of the watchdog timer in the P89LPC9321FN,112?
  The watchdog timer is used to reset the microcontroller in case it becomes stuck in an infinite loop or hangs due to a software or hardware fault. It can be enabled or disabled using the WDTE bit in the WDTMOD register.
• How do I use the UART in the P89LPC9321FN,112?
  The UART can be used by configuring the UART registers, such as the UARTCTL register to enable the UART, and the UARTBAUD register to set the baud rate. The UART can be used in asynchronous mode or synchronous mode.
• What is the power consumption of the P89LPC9321FN,112?
  The power consumption of the P89LPC9321FN,112 depends on the operating frequency, voltage, and mode of operation. In active mode, the typical current consumption is around 2.5 mA at 3.3V and 3.875 MHz. In sleep mode, the typical current consumption is around 10 μA.