NEC PD75402A, PD75P402 user manual Example of Poor Resonator Connection Circuit 2/2

Models: PD75402A PD75P402

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CHAPTER 5. PERIPHERAL HARDWARE FUNCTIONS

Fig. 5-13 Example of Poor Resonator Connection Circuit (2/2)

(c) Signal line close to varyin high current

(d) Current flows an oscillator power supply line.

(potentials at A, B and C fluctuate.)

μ

PD75402A

VDD

 

 

VDD

X1 X2

High current

μ

 

VDD

PD75402A

 

PORTn

VDD

A

 

 

X1

X2

 

C

B

 

(e) Signal is picked up.

μPD75402A

VDD

X1 X2

58

Page 69
Image 69
NEC PD75402A, PD75P402 user manual Example of Poor Resonator Connection Circuit 2/2