UPD78F4218AGF-3BA Renesas Electronics America, UPD78F4218AGF-3BA Datasheet - Page 28

• Manufacturer Part Number: UPD78F4218AGF-3BA
• Manufacturer: Renesas Electronics America

Specifications of UPD78F4218AGF-3BA

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Subsystem Clock Oscillator Characteristics (T
28
Resonator
Crystal
resonator
External
clock
Note Time required to stabilize oscillation after applying supply voltage (V
Cautions 1. When using the subsystem clock oscillator, wire as follows in the area enclosed by the
Remark For the resonator selection and oscillator constant, users are required to either evaluate the oscillation
themselves or apply to the resonator manufacturer for evaluation.
2. When the main system clock is stopped and the device is operating on the subsystem clock,
Recommended Circuit
µ
PD74HCU04
V
broken 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 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.
wait until the oscillation stabilization time has been secured by the program before switching
back to the main system clock.
SS
XT2
XT2
XT1
XT1
Oscillation frequency
(f
Oscillation
stabilization time
XT1 input frequency
(f
XT1 input high-/low-
level width (t
XT
XT
)
)
Parameter
µ µ µ µ PD78F4216A, 78F4218A, 78F4216AY, 78F4218AY
Data Sheet U14125EJ3V0DS
XTH
, t
Note
XTL
A
)
= − − − − 40 to +85° ° ° ° C)
4.5 V ≤ V
1.9 V ≤ V
Conditions
DD
DD
≤ 5.5 V
< 4.5 V
DD
).
MIN.
14.3
32
32
32.768
TYP.
1.2
MAX.
15.6
35
10
35
2
SS
.
Unit
kHz
kHz
µ s
s