upd78f0114hgb-8es-a Renesas Electronics Corporation., upd78f0114hgb-8es-a Datasheet - Page 424
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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High-Speed System Clock (Crystal/Ceramic) Oscillator Characteristics
(T
Notes 1. Indicates only oscillator characteristics. Refer to AC Characteristics for instruction execution time.
Cautions 1. When using the crystal/ceramic oscillator, wire as follows in the area enclosed by the broken
424
Ceramic
resonator
Crystal
resonator
External
clock
Resonator Recommended Circuit
A
= 40 to +85 C, 2.5 V
Note 2
2. Input a clock signal to the X1 pin and input the inverse clock signal to the X2 pin.
2. Since the CPU is started by the internal oscillation clock after reset, check the oscillation
CHAPTER 26 ELECTRICAL SPECIFICATIONS (STANDARD PRODUCTS, (A) GRADE PRODUCTS)
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.
stabilization time of the high-speed system clock using the oscillation stabilization time counter
status register (OSTC). Determine the oscillation stabilization time of the OSTC register and
oscillation stabilization time select register (OSTS) after sufficiently evaluating the oscillation
stabilization time with the resonator to be used.
V
V
SS
SS
C1
X1
C1
X1
X1
C2
C2
X2
X2
X2
V
DD
= EV
Oscillation
frequency (f
1
Oscillation
frequency (f
1
X1 input
frequency (f
1
X1 input high-
/low-level width
(t
XPH
DD
Parameter
, t
XPL
)
5.5 V, 2.5 V
XP
XP
XP
User’s Manual U16961EJ4V0UD
)
)
)
Note
Note
Note
4.0 V
3.5 V
3.0 V
2.5 V
4.0 V
3.5 V
3.0 V
2.5 V
4.0 V
3.5 V
3.0 V
2.5 V
4.0 V
3.5 V
3.0 V
2.5 V
AV
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
REF
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
< 4.0 V
< 3.5 V
< 3.0 V
< 4.0 V
< 3.5 V
< 3.0 V
< 4.0 V
< 3.5 V
< 3.0 V
< 4.0 V
< 3.5 V
< 3.0 V
5.5 V
5.5 V
5.5 V
5.5 V
Conditions
V
DD
, V
SS
= EV
SS
= AV
SS
= 0 V)
MIN.
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
30
46
56
96
TYP.
SS
MAX.
8.38
8.38
8.38
250
250
250
250
.
5.0
5.0
5.0
16
10
16
10
16
10
MHz
MHz
MHz
Unit
ns
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