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C504 Datasheet, PDF (49/49 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller | |||
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C504
AC Inputs during testing are driven at VCC â 0.5 V for a logic â1â and 0.45 V for a logic â0â.
Timing measurements are made at VIHmin for a logic â1â and VILmax for a logic â0â.
Figure 21
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 VOH/VOL level occurs.
IOL/IOH ⥠± 20 mA
Figure 22
AC Testing : Float Waveforms
Figure 23
Recommended Oscillator Circuits for Crystal Oscillator
Semiconductor Group
49
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