UPD78F9418AGK-9EU Renesas Electronics America, UPD78F9418AGK-9EU Datasheet - Page 282

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

Specifications of UPD78F9418AGK-9EU

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Subsystem Clock Oscillator Characteristics (T
280
Crystal
resonator
External
clock
Resonator
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, customers are requested to either evaluate the
Notes 1. Indicates only oscillator characteristics. Refer to AC Characteristics for instruction execution time.
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. The subsystem clock oscillator is designed as a low-amplitude circuit for reducing current
Recommended Circuit
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 main system clock
oscillator. Particular care is therefore required with the wiring method when the subsystem
clock is used.
V
XT1
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.
C3
XT1
C4
R
XT2
XT2
CHAPTER 21 ELECTRICAL SPECIFICATIONS
Oscillation frequency
(f
Oscillation stabilization
time
XT1 input frequency
(f
XT1 input high-/low-
level widths (t
XT
XT
)
)
Note 1
Note 1
Note 2
Parameter
User’s Manual U13952EJ3V1UD
XTH
A
= 40 to +85 C, V
, t
XTL
)
V
V
DD
DD
= 4.5 to 5.5 V
= 1.8 to 5.5 V
Conditions
DD
= 1.8 to 5.5 V)
MIN.
14.3
32
32
Use a resonator whose
32.768
TYP.
1.2
MAX.
15.6
35
10
35
SS0
2
.
Unit
kHz
kHz
s
s
s