upd78f0103 Renesas Electronics Corporation., upd78f0103 Datasheet - Page 372
upd78f0103
Manufacturer Part Number
upd78f0103
Description
8-bit Single-chip Microcontrollers
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD78F0103.pdf
(485 pages)
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X1 Oscillator Characteristics (T
Note Indicates only oscillator characteristics. Refer to AC Characteristics for instruction execution time.
Cautions 1. When using the X1 oscillator, wire as follows in the area enclosed by the broken lines in the
Ring-OSC Oscillator Characteristics (T
372
CHAPTER 23 ELECTRICAL SPECIFICATIONS (STANDARD PRODUCTS, (A) GRADE PRODUCTS) (EXPANDED-SPECIFICATION PRODUCTS)
Ceramic resonator
Crystal resonator
External clock
On-chip Ring-OSC oscillator
Resonator
2. Since the CPU is started by the Ring-OSC after reset is released, check the oscillation
Resonator
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 X1 input 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.
Recommended Circuit
V
V
SS
SS
X1
C1
C1
X1
X1
Oscillation frequency (f
A
C2
C2
X2
= −40 to +85°C, 2.5 V ≤ V
X2
X2
A
Parameter
= −40 to +85°C, 2.5 V ≤ V
Oscillation frequency
(f
Oscillation frequency
(f
X1 input frequency
(f
X1 input high-/low-
level width (t
User’s Manual U15836EJ5V0UD
XP
XP
XP
)
)
)
Note
Note
Note
Parameter
R
)
XPH
, t
XPL
DD
)
≤ 5.5 V, 2.5 V ≤ AV
4.0 V ≤ V
3.5 V ≤ V
3.0 V ≤ V
2.5 V ≤ V
4.0 V ≤ V
3.5 V ≤ V
3.0 V ≤ V
2.5 V ≤ V
4.0 V ≤ V
3.5 V ≤ V
3.0 V ≤ V
2.5 V ≤ V
4.0 V ≤ V
3.5 V ≤ V
3.0 V ≤ V
2.5 V ≤ V
DD
Conditions
≤ 5.5 V, 2.5 V ≤ AV
Conditions
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
≤ 5.5 V
< 4.0 V
< 3.5 V
< 3.0 V
≤ 5.5 V
< 4.0 V
< 3.5 V
< 3.0 V
≤ 5.5 V
< 4.0 V
< 3.5 V
< 3.0 V
≤ 5.5 V
< 4.0 V
< 3.5 V
< 3.0 V
REF
≤ V
MIN.
REF
120
MIN.
DD
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
38
46
56
96
, V
≤ V
SS
DD
TYP.
TYP.
240
= AV
, V
SS
SS
SS
= AV
MAX.
MAX.
480
8.38
8.38
8.38
500
500
500
500
.
5.0
5.0
5.0
= 0 V)
12
10
12
10
12
10
SS
= 0 V)
Unit
kHz
MHz
MHz
MHz
Unit
ns
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