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launchpad 上MSP430G2553接外部8M晶振需要接多大的电容？
yun mu, 你好！
MSP430G2553的外部晶振是不支持8MHz的，因为MSP430G2xxx系列没有XT2，而且对应的LFXT1也不支持HF Mode。故其对应的外接晶振一般都接32768Hz, 并且它有内部电容，可通过配置寄存器（XTS，XCAPx）来选择是否选用，选多大。下图为从MSP430G2553 Datasheet中对应说明，您可以参考。
