38.7 OSC20M Characteristics Figure 38-65. ATtiny1614/1616/1617: OSC20M Internal Oscillator: Calibration Stepsize vs. Calibration Value (VDD=3V) Figure 38-66. ATtiny1614/1616/1617: OSC20M internal Oscillator: Frequency vs. Calibration Value (VDD=3V) Figure 38-67. ATtiny1614/1616/1617: OSC20M Internal Oscillator: Frequency vs. Temperature Figure 38-68. ATtiny1614/1616/1617: OSC20M Internal Oscillator: Frequency vs. VDD