The maximum clock frequency of the MSP430F1612IPM is 8 MHz.
To use an external clock source, connect the external clock signal to the XIN pin and set the UCSSELx bits in the UCSCTL6 register to select the external clock source.
The RST/NMI pin is a dual-function pin that can be used as either a reset input (RST) or a non-maskable interrupt (NMI) input.
The watchdog timer can be enabled by setting the WDTCTL register. The watchdog timer can be configured to reset the device or trigger an interrupt when it times out.
The maximum current consumption of the MSP430F1612IPM is approximately 2.1 mA at 3V and 8 MHz.