Datasheet

78K0/Ix2 CHAPTER 5 CLOCK GENERATOR
R01UH0010EJ0500 Rev.5.00 167
Feb 28, 2012
Figure 5-10. Examples of Incorrect Resonator Connection (2/2)
(c) Wiring near high alternating current (d) Current flowing through ground line of oscillator
(potential at points A, B, and C fluctuates)
V
SS
X1 X2
V
SS
X1 X2
AB C
Pmn
V
DD
High current
High current
(e) Signals are fetched
VSS X1 X2
5.4.2 Internal high-speed oscillator
T
he internal high-speed oscillator is incorporated in the 78K0/Ix2 microcontrollers. Oscillation can be controlled by the
internal oscillation mode/PLL control register (RCM).
After a reset release, the internal high-speed oscillator automatically starts oscillation.
Internal high-speed oscillation clock frequency (4 MHz (TYP.)/8 MHz (TYP.)) can be set by the option byte.