96
CHAPTER 5 CLOCK GENERATOR
Preliminary User’s Manual U13420EJ2V0UM00
Figure 5-6. Examples of Incorrect Oscillator 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
X1
X2
IC
X1
X2
A
B
C
Pmn
V
DD0
High current
High current
V
SS1
V
SS1
IC
X1
X2
V
SS1
(e) Signals are fetched
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. When X2 and XT1 are wired in parallel, the cross-talk 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
SS1
.
Содержание mPD780065 Series
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