The maximum clock frequency for the LPC2478FBD208K is 72 MHz, but it can be overclocked to 100 MHz with some limitations.
The pin multiplexing on the LPC2478FBD208K can be configured using the PINSEL registers, which allow you to select the function of each pin.
The maximum amount of current that can be sourced or sunk by the GPIO pins on the LPC2478FBD208K is 4 mA.
The USB interface on the LPC2478FBD208K can be used by configuring the USB registers and using the USB library provided by NXP Semiconductors.
The power consumption of the LPC2478FBD208K varies depending on the operating mode, but it can be as low as 10 uA in power-down mode and up to 350 mA in active mode.