UPD78F9418AGK-9EU Renesas Electronics America, UPD78F9418AGK-9EU Datasheet - Page 281

• Manufacturer Part Number: UPD78F9418AGK-9EU
• Manufacturer: Renesas Electronics America

Specifications of UPD78F9418AGK-9EU

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Main System Clock Oscillator Characteristics (T
Ceramic
resonator
External
clock
Crystal
resonator
Resonator
Notes 1. Indicates only oscillator characteristics. Refer to AC Characteristics for instruction execution time.
Cautions 1. When using the main system clock oscillator, wire as follows in the area enclosed by the
Remark For the resonator selection and oscillator constant, customers are requested to either evaluate the
2. Time required to stabilize oscillation after reset or STOP mode release.
oscillation themselves or apply to the resonator manufacturer for evaluation.
oscillation is stabilized within the oscillation wait time.
2. When the main system clock is stopped and the device is operating on the subsystem clock,
Recommended Circuit
broken lines in the above figures to avoid an adverse effect from wiring capacitance.
wait until the oscillation stabilization time has been secured by the program before switching
back to the main system clock.
V
X1
V
X1
SS0
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.
SS0
C1
C1
X1
X1
C2
C2
OPEN
X2
X2
X2
X2
CHAPTER 21 ELECTRICAL SPECIFICATIONS
Oscillation frequency
(f
Oscillation stabilization
time
Oscillation frequency
(f
Oscillation stabilization
time
X1 input frequency
(f
X1 input high-/low-level
widths (t
X1 input frequency
(f
X1 input high-/low-level
widths (t
X
X
X
X
)
)
)
)
Note 1
Note 1
Note 1
Note 1
Note 2
Note 2
Parameter
XH
XH
, t
, t
User’s Manual U13952EJ3V1UD
XL
XL
)
)
A
= 40 to +85 C, V
V
range
After V
oscillation start voltage
V
V
V
V
DD
DD
DD
DD
DD
= Oscillation voltage
= 4.5 to 5.5 V
= 1.8 to 5.5 V
= 2.7 to 5.5 V
= 2.7 to 5.5 V
DD
has reached MIN. of
Conditions
DD
= 1.8 to 5.5 V)
MIN.
1.0
1.0
1.0
1.0
85
85
Use a resonator whose
TYP.
MAX.
500
500
5.0
5.0
5.0
5.0
10
30
SS0
4
.
MHz
MHz
MHz
MHz
Unit
ms
ms
ms
ns
ns
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