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V1.2.2
CMS32L051 User Manual |Chapter 4 Clock Generation Circuit
www.mcu.com.cn 81 / 703
Figure 4-14 Example of an external circuit for XT1 oscillation circuit
Vss
XT1
XT2
(a) cyrstal oscilation
(b) external clock
EXCLKSexternal clock
32.768
KHz
Note When using the X1 oscillation circuit and the XT1 oscillation circuit, in order to avoid the influence of the routing
capacitance, etc., the dotted lines in Figure 4-13 and Figure 4-14 must be routed as follows:
Routing must be kept as short as possible.
routing that has a large current flow with variations.

SS
,
and the ground pattern of large currents flowing through must not be grounded.


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