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µ
RC oscillation (
PD789861, 78E9861A)
(T
= –40 to +85°C, V
= 1.8 to 3.6 V)
A
DD
Resonator
Recommended Circuit
RC oscillator
CL1
External clock
CL1
Notes 1. Indicates only oscillator characteristics. Refer to AC Characteristics for instruction execution time.
2. Variations due to external resistance and external capacitance are not included.
Caution When using an RC 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 with 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 V
• Do not ground the capacitor to a ground pattern through which a high current flows.
• Do not fetch signals from the oscillator.
CHAPTER 20 ELECTRICAL SPECIFICATIONS
Parameter
CL2
Oscillation frequency
Notes 1,2
(f
)
CC
CL1 input frequency
CL2
Note 1
(f
)
CC
CL1 input high-/low-
level width (t
,t
)
XH
XL
User's Manual U14826EJ5V0UD
Conditions
MIN.
V
= Oscillation
0.85
DD
voltage range
1.0
85
TYP.
MAX.
Unit
1.15
MHz
5.0
MHz
500
ns
.
SS
183
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