upd78f0114hgb-8es-a Renesas Electronics Corporation., upd78f0114hgb-8es-a Datasheet - Page 444
upd78f0114hgb-8es-a
Manufacturer Part Number
upd78f0114hgb-8es-a
Description
8-bit Single-chip Microcontrollers
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD78F0114HGB-8ES-A.pdf
(505 pages)
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Subsystem Clock Oscillator Characteristics
(T
Note Indicates only oscillator characteristics. Refer to AC Characteristics for instruction execution time.
Cautions 1. When using the subsystem clock oscillator, wire as follows in the area enclosed by the broken
Remark For the resonator selection and oscillator constant, users are required to either evaluate the oscillation
444
Crystal
resonator
External clock
A
Resonator
= 40 to +110 C, 2.7 V
2. The subsystem clock oscillator is designed as a low-amplitude circuit for reducing power
themselves or apply to the resonator manufacturer for evaluation.
lines in the above figure to avoid an adverse effect from wiring capacitance.
consumption, and is more prone to malfunction due to noise than the high-speed system clock
oscillator. Particular care is therefore required with the wiring method when the subsystem
clock is used.
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.
Recommended Circuit
V
XT2
SS
C4
CHAPTER 27 ELECTRICAL SPECIFICATIONS ((A1) GRADE PRODUCTS)
Rd
XT2
C3
V
XT1
XT1
DD
= EV
DD
Oscillation frequency
(f
XT1 input frequency
(f
XT1 input high-/low-level
width (t
XT
XT
)
)
5.5 V, 2.7 V
Note
Note
User’s Manual U16961EJ4V0UD
Parameter
XTH
, t
XTL
)
AV
REF
V
DD
, V
Conditions
SS
= EV
SS
= AV
SS
MIN.
32
32
12
= 0 V)
32.768
TYP.
SS
MAX.
38.5
15.6
35
.
Unit
kHz
kHz
s
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