upd17240 Renesas Electronics Corporation., upd17240 Datasheet - Page 90

• Manufacturer Part Number: upd17240
• Description: 4-bit Single-chip Microcontrollers For Small General-purpose Infrared Remote Control Transmitters
• Manufacturer: Renesas Electronics Corporation.

System Clock Oscillator Characteristics (T
90
Ceramic
resonator
Resonator
Notes 1. The oscillation frequency only indicates the oscillator characteristics.
Caution When using the system clock oscillator, wire as follows in the area enclosed by the dotted lines
2. The oscillation stabilization time is necessary for oscillation to be stabilized after V
in the above figure, 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
• Always make the ground point of the oscillator capacitor the same potential as GND. Do not
• Do not fetch signals from the oscillator.
STOP mode release.
through which a large current flows.
ground the capacitor to a ground pattern through which a large current flows.
Recommended
X
Constants
IN
X
OUT
µ PD17240, 17241, 17242, 17243, 17244, 17245, 17246
Oscillation frequency
(f
Oscillation
stabilization time
X
)
Note 1
Data Sheet U15002EJ1V1DS
A
= –40 to +85
Item
Note 2
°
C, V
After V
in oscillation voltage
range
DD
Conditions
= 2.0 to 3.6 V)
DD
reached MIN.
MIN.
1.0
TYP.
4.0
DD
application or
MAX.
8.0
4
MHz
Unit
ms