The maximum operating temperature range for the LPC1857FET256,551 is -40°C to +105°C.
The clock settings for the LPC1857FET256,551 can be configured using the Clock Control Unit (CCU) registers. Refer to the LPC1857 user manual for detailed information on clock configuration.
The maximum frequency for the LPC1857FET256,551 is 180 MHz.
The ADC on the LPC1857FET256,551 can be used by configuring the ADC registers and using the ADC interrupts. Refer to the LPC1857 user manual for detailed information on ADC usage.
Yes, the LPC1857FET256,551 can be used with an external crystal oscillator. The external crystal oscillator can be connected to the XTALIN and XTALOUT pins.