The maximum clock frequency of the LM3S818 is 50 MHz.
The LM3S818 has 256 KB of flash memory.
Yes, the LM3S818 is rated for industrial temperature ranges (-40°C to 85°C).
No, the LM3S818 does not have built-in Ethernet capability. However, it has a 10/100 Ethernet MAC interface that can be used with an external PHY chip.
The power consumption of the LM3S818 varies depending on the clock frequency and operating mode. In active mode, the typical current consumption is around 50 mA at 50 MHz.