SLAS580E October 2008 – May 2020 MSP430FG477 , MSP430FG478 , MSP430FG479
PRODUCTION DATA.
The clock system is supported by the FLL+ module, which includes support for a 32768-Hz watch crystal oscillator, an internal digitally-controlled oscillator (DCO), and a 8-MHz high-frequency crystal oscillator (XT1), plus a 8-MHz high-frequency crystal oscillator (XT2). The FLL+ clock module is designed to meet the requirements of both low system cost and low power consumption. The FLL+ features digital frequency locked loop (FLL) hardware that, in conjunction with a digital modulator, stabilizes the DCO frequency to a programmable multiple of the watch crystal frequency. The internal DCO provides a fast turn-on clock source and stabilizes in less than 6 s. The FLL+ module provides the following clock signals: