SLAU213A Datasheet, PDF (10/19 Pages) Texas Instruments – MSP430FG4618/F2013 Experimenter’s Board

6.4 System Clocks
The experimenter’s board has various system clock options that support low and
high frequencies. Each MSP430 has integrated clock sources as well as support
for external connections.
6.4.1 MSP430F2013 Clock Sources
The MSP430F2013 uses the internal VLO operating at ~12kHz for an
ultra-low power standby wake up time base. The integrated DCO is
internally programmable at frequencies up to 16MHz for high speed CPU
and system clocking.
6.4.2 MSP430FG4618 Clock Sources
A standard 32.768kHz watch crystal is populated at footprint X2 and
sources source ACLK of the MSP430FG4618 for low frequency, ultra-low
power standby operation and RTC functionality. The integrated FLL+ clock
module provides a programmable internal high frequency clock source for
the CPU and other peripherals on-chip. In addition to the FLL+, an
external high frequency crystal or resonator up to 8MHz can be added via
footprint X1.
6.5 Jumper Configurations
The board supports various peripherals and components to be enabled when
required and disabled when not in use to reduce overall power consumption. This
is achieved either by software or directly in hardware. Some of the jumpers are
mandatory for the board to function correctly. Refer to Appendix B for detailed
information regarding the exact locations of these jumpers and their functionality.
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