UPD77018A NEC, UPD77018A Datasheet - Page 35

• Manufacturer Part Number: UPD77018A
• Description: 16 bits/ Fixed-point Digital Signal Processor
• Manufacturer: NEC

Oscillator Circuit
Recommended Oscillator Circuit Constants
TBD
Ceramic or crystal resonator
External clock
Cautions 1. When using system clock oscillator, wire the portion enclosed in broken lines in the figure
2. When using ceramic resonator or crystal resonator, frequency multiple rate should be
Resonator
as follows to avoid adverse influences on the wiring capacitance:
• Keep the wiring length as short as possible.
• Do not cross the wiring over the other signal lines.
• Do not route the wiring in the vicinity of lines through which a high fluctuating current
• Always keep the ground point of the capacitor of the oscillator circuit at the same
• Do not connect the power source pattern through which a high current flows.
• Do not extract signals from the oscillator.
specified to as 1 by mask option. The device does not operate in other frequency multiple
rate.
flows.
potential as GND.
NU: Not Use. Leave Open.
Recommended Circuit
External Clock
Supply
C1
X1
X1
X2
NU
X2
C2
PD77018A, 77019
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