The maximum clock frequency that can be used with the internal oscillator is 8 MHz. However, it's recommended to use a clock frequency of 4 MHz or less to ensure reliable operation.
To configure the device to use an external crystal oscillator, you need to set the XT2OFF bit in the SYSCTL_DCGC2 register to 0, and then select the desired crystal frequency using the XT2Sx bits in the SYSCTL_CLK2CTL register.
The minimum voltage required for the device to operate in low-power mode is 1.8 V. However, the device can operate down to 1.4 V in low-power mode 3 (LPM3) and 1.2 V in low-power mode 4 (LPM4).
The device can be woken up from low-power mode using an external interrupt, a timer overflow, or a reset. The wake-up source can be configured using the WORx registers in the SYSCTL module.
The maximum current consumption of the device in active mode is approximately 2.1 mA at 3 V and 1.5 mA at 2.2 V, depending on the clock frequency and operating conditions.