LPC1754FBD80 datasheet by NXP Semiconductors

LPC1754FBD80 Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that can be used with the internal oscillator?
  The maximum clock frequency that can be used with the internal oscillator is 25 MHz. However, it's recommended to use a crystal oscillator or an external clock source for more accurate and stable clocking.
• How do I configure the pin multiplexing to use the I2S interface?
  To configure the pin multiplexing for I2S, you need to set the PINSEL registers to select the I2S function for the desired pins. For example, to use P0.0 as I2S_WS, set PINSEL0 to 0x02. Refer to the user manual for more information on pin multiplexing.
• What is the maximum current that can be sourced or sunk by the GPIO pins?
  The maximum current that can be sourced or sunk by the GPIO pins is 4 mA. However, it's recommended to limit the current to 2 mA to ensure reliable operation.
• How do I enable the brown-out detection (BOD) feature?
  To enable the BOD feature, set the BODCR register to the desired voltage threshold and enable the BOD interrupt. The BOD feature will reset the microcontroller if the voltage drops below the set threshold.
• What is the minimum voltage required for the ADC to operate correctly?
  The minimum voltage required for the ADC to operate correctly is 2.4 V. However, it's recommended to operate the ADC at a voltage above 2.7 V for optimal performance.