The maximum operating temperature range for the MSP430F2254IRHAT is -40°C to 85°C.
To configure the MSP430F2254IRHAT for low-power mode, you need to set the LPMx bits in the status register (SR) to the desired low-power mode (LPM0, LPM1, LPM2, LPM3, or LPM4). You can also use the __bis_SR_register_on_exit() function from the MSP430 header file to set the low-power mode.
The maximum clock frequency for the MSP430F2254IRHAT is 16 MHz.
To use the internal oscillator on the MSP430F2254IRHAT, you need to set the XT2OFF bit in the FLL_CTL0 register to 0 and configure the FLL_CTL1 register to select the desired oscillator frequency.
The current consumption of the MSP430F2254IRHAT in active mode is approximately 230 μA/MHz at 16 MHz and 3.0 V.
MSP430F2254IRHAT datasheet
by Texas Instruments
