NEC UPD789426 Series User Manual page 113

Figure 5-9. Examples of Incorrect Connection for RC Oscillation (2/3)
• Main system clock
CL1 CL2
High current
(d) Current flowing through ground line of oscillator (potential at points A, B, and C fluctuates)
• Main system clock
V
DD
PORTn
(n = 0 to 3, 5, 7 to 9)
CL1 CL2
A
High current
CHAPTER 5 CLOCK GENERATOR
(c) Wiring near high fluctuating current
V
SS
V
SS
B
User's Manual U15075EJ2V1UD
• Subsystem clock
XT1 XT2
High current
• Subsystem clock
V
DD
PORTn
(n = 0 to 3, 5, 7 to 9)
XT1
A
High current
V
SS
XT2 V
SS
B C
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