CHAPTER 5 CLOCK GENERATOR
Preliminary User’s Manual U16315EJ1V0UD
114
Figure 5-11. Examples of Incorrect Resonator Connection (2/2)
(c) Wiring near high alternating current
(d) Current flowing through ground line of oscillator
(potential at points A, B, and C fluctuates)
IC
X2
X1
IC
X2
X1
A
B
C
Pmn
V
DD0
High current
High current
V
SS
V
SS
(e) Signals are fetched
IC
X2
X1
V
SS
Remark
When using the subsystem clock, replace X1 and X2 with XT1 and XT2, respectively. Also, insert
resistors in series on the XT2 side.
Cautions 2. When X2 and XT1 are wired in parallel, the crosstalk noise of X2 may increase with XT1,
resulting in malfunctioning.
To prevent that from occurring, it is recommended to wire X2 and XT1 so that they are not in
parallel, and to connect the IC pin between X2 and XT1 directly to V
SS
.
Содержание 78K0/KD1 Series
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