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LP-MSP430FR2476: LP-MSP430FR2476 开发板 外部晶体振荡器负载电容问题

Part Number: LP-MSP430FR2476
Other Parts Discussed in Thread: MSP430FR2476,

参照下面【MSP430 32kHz 晶体振荡器应用笔记】

https://www.ti.com/lit/an/slaa322d/slaa322d.pdf?ts=1710320145240

MSP430FR2476的外部负载容量应该是 23pF

CL1=CL2=(2×12.5)-2=23pF

但是,LP-MSP430FR2476开发板的外部负载容量是  C3=4=12pF   (LP-MSP430FR2476 数据表 第24页  开发板电路图C3,C4)

请问为什么和计算不一样?