看了一下资料，有点蒙蒙的感觉，还没能整明白，那个Power supply scheme 的ADC框图中有一个双路开关，一边接到VDDA，另一边接到一个电容波波的参考电压源上，这个参考电压源是从哪个脚来的？
2.3.11 Power supply schemes
● VSSA , VDDA = 2.0 to 3.6 V: external analog power supplies for ADC, Reset blocks, RCs
and PLL (minimum voltage to be applied to V is 2.4 VDDA when the ADC is used). VDDA
and VSSA must be connected to VDD and VSS , respectively.
For more details on how to connect power pins, refer to Figure 12: Power supply scheme.
|
楼主
