C511 Datasheet, PDF (43/43 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

C511 / C513
AC Inputs during testing are driven at V_CC - 0.5 V for a logic ’1’ and 0.45 V for a logic ’0’.
Timing measurements are made at V_IHmin for a logic ’1’ and V_ILmax for a logic ’0’.
Figure 20
AC Testing: Input, Output Waveforms
For timing purposes a port pin is no longer floating when a 100 mV change from load voltage
occurs and begins to float when a 100 mV change from the loaded V_OH/V_OL level occurs.
I_OL/I_OH ≥ ± 20 mA
Figure 21
AC Testing: Float Waveforms
Figure 22
Recommended Oscillator Circuits for Crystal Oscillator
Semiconductor Group
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