LPC11U68JBD100E datasheet by NXP Semiconductors

LPC11U68JBD100E 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 12 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 desired peripherals?
  The pin multiplexing can be configured using the PINSELx registers. Each peripheral function has a specific pin multiplexing setting, which can be found in the datasheet. The PINSELx registers need to be programmed accordingly to enable the desired peripheral function on a specific pin.
• 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 and to prevent overheating.
• How do I use the ADC in differential mode?
  To use the ADC in differential mode, the ADCn_CFG register needs to be configured to select the differential input pair. The ADCn_CNT register is used to select the gain and the ADCn_DAT register is used to read the converted value. The differential input pair can be selected using the ADCn_CFG register.
• What is the minimum and maximum voltage that can be used to power the device?
  The minimum voltage that can be used to power the device is 1.8 V and the maximum voltage is 3.6 V. It's recommended to use a voltage regulator to ensure a stable power supply within this range.