MC81F4x1636 April 24, 2012 Ver.1.417.13 Internal RC Oscillation Characteristics(TA = - 40 °C to + 85°C, VDD = 2.2 V to 5.0 V)Parameter Symbol Conditions Min Typ. Max UnitsVDD =5.0V, TA = 25°C -4% 8.0 4%RC oscillatorfrequency (1) fIRC VDD =5.0V,TA = – 40°C to + 85°C -20% 8.0 20%MHzClock duty ratio TOD – 40 50 60 %RC oscillator setuptime (2) tSUIRC TA = 25°C – – 10 mSNOTES:1. Data based on characterization results, not tested in production2. XIN and XOUT pins can be used as I/O ports.7.14 Main Oscillation Stabilization Time(T A = - 10 °C to + 70°C, VDD = 2.2 V to 5.5 V)Oscillator Conditions Min Typ. Max UnitsCrystal – – 60 mSCeramicfx > 1 MHzOscillation stabilization occurs whenVDD is equal to the minimumoscillator voltage range.– – 10 mSExternal Clock XIN input high and low width (tXH,tXL) 40.0 – 480 nSX IN 0.8V D D0.2V D Dt X Ht X L1 / fxFigure 7-9 Clock Timing Measurement at XIN
