The maximum clock frequency of the TM4C1230E6PMIR is 80 MHz, but it can be overclocked to 120 MHz with some limitations.
The pin muxing on the TM4C1230E6PMIR can be configured using the Pin Mux Utility tool provided by Texas Instruments, or by writing code to configure the GPIO registers directly.
The main difference between the TM4C1230E6PMIR and the TM4C1230H6PMIR is the package type. The TM4C1230E6PMIR is in a QFN (Quad Flat No-Lead) package, while the TM4C1230H6PMIR is in a BGA (Ball Grid Array) package.
Yes, the TM4C1230E6PMIR can be used with an external crystal oscillator. The device has an internal oscillator, but it can also be driven by an external clock source.
The TM4C1230E6PMIR can be programmed using a variety of tools, including the Keil µVision IDE, IAR Embedded Workbench, and the Texas Instruments Code Composer Studio (CCS).