PD17202AGF-011_15 Datasheet, PDF (24/30 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND KEY SCAN CIRCUIT FOR FPC (FRONT PANEL CONTROLLER)

µPD17202AGF-011
System Clock Oscillation Circuit Characteristics (TA = –20 to +75 ˚C, VDD = 2.2 to 5.5 V)
Oscillator
Ceramic
resonator ^{Note 1}
Crystal
resonator ^{Note 1}
Recommended
Constants
XIN
XOUT
XIN
XOUT
Parameter
Oscillation frequency
(fX) ^{Note 2}
Condition
MIN. TYP. MAX. Unit
1.0 4.0 8.0 MHz
Oscillation stabilization
time ^{Note 3}
After VDD has reached
MIN. value of oscillation
voltage range
4
ms
Oscillation frequency
(fX) ^{Note 2}
1.0 4.0 8.0 MHz
Oscillation stabilization VDD = 4.5 to 6.0 V
time ^{Note 3}
10 ms
30 ms
Notes 1. Use of the ceramic resonator and crystal resonator shown on the next page is recommended.
2. The oscillation frequency only indicates the characteristics of the oscillation circuit. For the instruction
execution time, refer to Recommended Operation Range.
3. The oscillation stabilization time is the time required for oscillation to stabilize after VDD application or
release of the STOP mode.
Caution When using the system clock oscillation circuit, wire the portion indicated by the dotted lines in
the above figures to avoid adverse influence from wiring capacitance.
• Keep the wiring length as short as possible.
• Do not cross the wiring with any other signal lines. Do not route the wiring in the vicinity of
a line through which a high alternating current flows.
• Always keep the ground point of the capacitor of the oscillation circuit at the same potential
as GND. Do not ground the capacitor to a ground pattern through which a high current flows.
• Do not extract signals from the oscillation circuit.
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