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Figure 7-8. Examples of Resonator with Incorrect Connection (2/2)
(c) Changing high current is too near a
signal line
X2
High
Current
(e) Signals are fetched
X2
Remark When using a subsystem clock, replace X1 and X2 with XT1 and XT2, respectively. Also, insert resistors
in series on the XT2 side.
Cautions 2. If XT2 and X1 are wired in parallel, the crosstalk noise of X1 may be transmitted along XT2
and cause malfunctions. To prevent that from occurring, it is recommended to wire XT2
and X1 so that they are not in parallel, and to correct the IC pin between XT2 and X1 directly
to V
.
SS
CHAPTER 7 CLOCK GENERATOR
X1
IC
X1
IC
(d) Current flows through the grounding line
of the resonator (potential at points A, B,
and C fluctuate)
AV
DD
Pnm
X2
A
X1
IC
B
C
High
Current
163
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