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25.2.3 Oscillator characteristics
Remark:
Values of capacitors C1', C2' and R' depend on used crystal or resonator and must be
specified in cooperation with the manufacturer.
Cautions: 1. External clock input is prohibited.
2. 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 through which a high fluctuating
current flows.
•
Always make the ground point of the oscillator capacitor the same potential
as CV
•
Do not ground the capacitor to a ground pattern through which a high
current flows.
•
Do not fetch signals from the oscillator.
Parameter
Oscillation frequency
Oscillation stabilization
time
Chapter 25 Electrical Specifications
Figure 25-1: Oscillator Recommendations
X1
C1'
.
SS
Table 25-4: Oscillator Characteristics
Symbol
Conditions
f
OSC
t
f
= 16 MHz
OST
OSC
User's Manual U16580EE3V1UD00
X2
R'
Qu
C2'
MIN.
TYP.
MAX.
Unit
16
MHz
4.096
ms
1009
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