UPD784907 Datasheet, PDF (37/98 Pages) NEC – 16-BIT SINGLE-CHIP MICROCONTROLLER

µPD784907, 784908
Compared with the main system clock oscillator, the watch clock oscillator, which is a low-gain circuit designed
to reduce current consumption, is more likely to cause noise-induced malfunctions. Therefore, special care should
be taken when using the watch clock oscillator.
The microcontroller can operate normally only when the oscillation is normal and stable. If a high-precision oscillator
frequency is required, consult with the oscillator manufacturer.
Figure 8-4. Notes on Connecting the Oscillator
µ PD784908
X2
X1
VSS
Cautions 1. Place the oscillator as close as possible to pins X1 and X2 (XT1 and XT2).
2. Do not let other signal lines cross that part of the circuit enclosed in broken lines.
Data Sheet U11680EJ2V0DS00
37