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430F149 32.768晶振负载电容 怎么设置 支持FLL_CTL0寄存器吗
f149内部默认的负载电容是12pF，不用设置。
你好，
建议使用外部负载电容，推荐值12pF~
不支持FLL_CTL0
User's guide 4.2.2章节有详细描述 http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=slau049&fileType=pdf
The LFXT1 oscillator supports ultralow-current consumption using a
32,768-Hz watch crystal in LF mode (XTS = 0). A watch crystal connects to XIN
and XOUT without any other external components. Internal 12-pF load
capacitors are provided for LFXT1 in LF mode. The capacitors add serially,
providing a match for standard 32,768-Hz crystals requiring a 6-pF load.
Additional capacitors can be added if necessary.
