2.15.2.1.2. Mitigating ROSC frequency variation due to voltage
Supply voltage varies for two reasons. Firstly, the power supply itself may vary, and secondly, there will be varying onchip IR drop as chip activity varies. If the application has a minimum performance target then the user needs to
calibrate for that application and adjust the ROSC frequency to ensure it always exceeds the minimum required.
由于不能截图我就把原文复制了一段。
rp2040datasheet 第208页
文中说芯片上的红外线也会影响电压变化,我用红外线照射试了一下,没怎么变化呀。照射前后就没有什么明显改变,甚至察觉不出来。
这咋回事?