The maximum clock frequency of the TM4C123FH6PMI is 80 MHz.
The pin muxing on the TM4C123FH6PMI can be configured using the Pin Muxing Register (PMCn) and the Pin Configuration Register (PCn). Refer to the datasheet for specific register addresses and bit fields.
The VDDA pin is the analog power supply pin, and the VDD pin is the digital power supply pin. Both pins should be connected to a power source, and decoupling capacitors should be used to filter out noise.
The internal oscillator on the TM4C123FH6PMI can be enabled by setting the OSCSRC bit in the System Control Register (SYSCTL_RCC). The oscillator frequency can be adjusted using the RCFREQ bit in the same register.
The maximum current rating of the GPIO pins on the TM4C123FH6PMI is 4 mA per pin.