µPD17P228

16

Data Sheet U14542EJ1V0DS00

Resonator

Recommended

Item

Conditions

MIN.

TYP.

MAX.

Unit

Constants

Ceramic

Oscillation frequency

1.0

4.0

8.0

MHz

resonator

Note 1

Oscillation

4

ms

stabilization time

Note 2

in oscillation voltage

range

Notes 1. The oscillation frequency only indicates the oscillator characteristics.

STOP mode release.

Caution To use a system clock oscillator circuit, perform the wiring in the area enclosed by the dotted

line in the above figure as follows, to avoid adverse wiring capacitance influences:

•

Keep wiring length as short as possible.

•

Do not cross a signal line with some other signal lines. Do not route the wiring in the vicinity

of lines through which a large current flows.

•

Always keep the oscillator capacitor ground at the same potential as GND. Do not ground the

capacitor to a ground pattern, through which a large current flows.

•

Do not extract signals from the oscillator.

External circuit example

Remark

To select a resonator and determine oscillator constants, please evaluate the oscillation yourself or

request the resonator manufacturer to evaluate it.

R1

C2

C1