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CC2640 的24M晶振不起振问题

Other Parts Discussed in Thread: CC2650

用的是TI 工程。 C:\ti\simplelink\ble_sdk_2_02_01_18\examples\ble_examples-ble_examples-2.2\examples\cc2650lp\simple_beacon\iar\simple_beacon.eww

在CC2650 LaunchPad 上运行没有问题。

在自己的CC2640F128RHB上运行,能用TI XDS110下载和单步运行,但不能发射信号,检测发现24M晶振不能起振。

VDDR采用内部DC/DC转换输出,电源电压实测1.67V,电源纹波20mV。

请问可能的问题在什么地方?