NEC 78K0S/KB1+ User Manual page 352
8-bit single-chip microcontrollers
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Also See for 78K0S/KB1+:
- Application note (49 pages) ,
- Application note (44 pages) ,
- Application note (37 pages)
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CHAPTER 22 ELECTRICAL SPECIFICATIONS (TARGET VALUES) ((A2) grade product)
X1 Oscillator Characteristics (T
Resonator Recommended Circuit
Ceramic
V
X1
X2
SS
resonator
C1
C2
Crystal
V
X1
X2
SS
resonator
C1
C2
External
X1
clock
Notes 1.
Use this product in a voltage range of 2.26 to 5.5 V because the detection voltage (V
clear (POC) circuit is 2.26 V (MAX.).
2.
Indicates only oscillator characteristics. Refer to AC Characteristics for instruction execution time.
Caution When using the X1 oscillator, wire as follows in the area enclosed by the broken lines in the above
figures 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 V
• Do not ground the capacitor to a ground pattern through which a high current flows.
• Do not fetch signals from the oscillator.
Remark For the resonator selection and oscillator constant, users are required to either evaluate the oscillation
themselves or apply to the resonator manufacturer for evaluation.
352
= −40 to +125°C, V
= 2.0 to 5.5 V
A
DD
Parameter
Oscillation
Note 2
frequency (f
)
X
Oscillation
Note 2
frequency (f
)
X
2.7 V ≤ V
X1 input
Note 2
frequency (f
)
X
2.0 V ≤ V
2.7 V ≤ V
X1 input high-
/low-level width
2.0 V ≤ V
(t
, t
)
XH
XL
User's Manual U17446EJ3V1UD
(A2) grade product T
Note 1
, V
= 0 V)
SS
Conditions
≤ 5.5 V
DD
< 2.7 V
DD
≤ 5.5 V
DD
< 2.7 V
DD
= −40 to +125°C
A
MIN.
TYP.
MAX.
Unit
1
8.0
MHz
1
8.0
MHz
1
8.0
MHz
1
5.0
μ
0.057
0.5
s
0.09
0.5
) of the power-on-
POC
.
SS
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