C515C Datasheet, PDF (68/69 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

C515C
V_CC -0.5 V
0.2 V_CC+0.9
Test Points
0.45 V
0.2 V_CC -0.1
MCT00039
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 33
AC Testing: Input, Output Waveforms
V_Load
V_Load +0.1 V
Timing Reference
Points
V_OH ^{-0.1 V}
V_Load ^{-0.1 V}
V_OL +0.1 V
MCT00038
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 34
AC Testing : Float Waveforms
Figure 35
Recommended Oscillator Circuits for Crystal Oscillator
Semiconductor Group
68
1997-07-01