UPD6P8 NEC [NEC], UPD6P8 Datasheet - Page 40

• Manufacturer Part Number: UPD6P8
• Description: MOS INTEGRATED CIRCUIT 4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION
• Manufacturer: NEC [NEC]

9. SYSTEM CLOCK OSCILLATOR ( PD6P8, 6P8A)
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The system clock oscillator consists of oscillators for ceramic resonators (f
The system clock oscillator stops oscillating when a reset is applied or in STOP mode.
Caution When using the system clock oscillator, wire as follows in the area enclosed by the broken lines
in the above figure to avoid an adverse effect from wiring capacitance.
• Keep the wiring length as short as possible.
• Do not cross the wiring with the other signal lines. Do not route the wiring near a signal line
• Always make the ground point of the oscillator capacitor the same potential as GND. Do not
• Do not fetch signals from the oscillator.
through which a high fluctuating current flows.
ground the capacitor to a ground pattern through which a high current flows.
Ceramic resonator
X
OUT
Figure 9-1. System Clock
Data Sheet U17848EJ3V0DS
X
IN
GND
X
= 3.5 to 4.5 MHz).
PD6P8, 6P8A, 6P8B