1009Chapter 25 Electrical SpecificationsUser’s Manual U16580EE3V1UD0025.2.3 Oscillator characteristicsFigure 25-1: Oscillator RecommendationsRemark: Values of capacitors C1’, C2’ and R’ depend on used crystal or resonator and must bespecified in cooperation with the manufacturer.Cautions: 1. External clock input is prohibited.2. Wire as follows in the area enclosed by the broken lines in the above figure toavoid an adverse effect from wiring capacitance.• 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 fluctuatingcurrent flows.• Always make the ground point of the oscillator capacitor the same potentialas CV SS.• Do not ground the capacitor to a ground pattern through which a highcurrent flows.• Do not fetch signals from the oscillator.Table 25-4: Oscillator CharacteristicsParameter Symbol Conditions MIN. TYP. MAX. UnitOscillation frequency fOSC 16 MHzOscillation stabilizationtimetOST fOSC = 16 MHz 4.096 msX2X1C2'C1'R'Qu
