Clock instructions
The system clock source includes the following types:
ROSC
DCO
XTAL-32k
XTAL-26M
AUPLL
DPLL
note:XTAL is external clock:
XTAL-32k:external 32k;
XTAL-26M: external 26M;
The system is equipped with an external 26M clock default. The external 32K clock can accorde to project requirements。
Clock Configuration
The 32k clock source has the following types:
rosc
Advantages and disadvantages: Low power consumption good,but the clock is relatively inaccurate,You can use it when you need the best power consumption。
external 26M division 32k
Advantages and disadvantages: Good precision, but higher power consumption
external 32k
Advantages and disadvantages: The precision is good, and the power consumption is lower than that of the external 26M division 32k clock
so you can select different 32k source clock based on owner using scenarios
Introduction to DPLL usage
DPLL is external 26M Frequency doubling(a.320M;b.480M)
The working clock of WIFI is DPLL(480M)
The working clock of BT is DPLL(480M)
it can select different DPLL according to the specific scenarios