The maximum operating frequency of the LM3S1918 is 50 MHz.
The LM3S1918 has 256 KB of flash memory.
The LM3S1918 has 64 KB of RAM.
Yes, the LM3S1918 has a built-in USB 2.0 full-speed interface.
The power consumption of the LM3S1918 varies depending on the operating frequency and mode. In active mode, the typical current consumption is around 35 mA at 50 MHz, and in sleep mode, it is around 1.5 mA.