C517A Datasheet, PDF (69/72 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

C517A
V_DD
0.45 V
0.2 V_CC+0.9
V_DD
Test Points
0.2 V_CC -0.1
V_DD
MCT00039
AC Inputs during testing are driven at V_DD - 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 34
AC Testing: Input, Output Waveforms
V_Load
V_Load ^{-0.1 V}
Timing Reference
Points
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 35
AC Testing : Float Waveforms
Crystal Oscillator Mode
C
XTAL1
Driving from External Source
N.C.
XTAL1
3.5-24 MHz
C
XTAL2
Crystal Mode : C = 20 pF ^± 10 pF
(incl. stray capacitance)
External Oscillator
Signal
XTAL2
MCS03339
Figure 36
Recommended Oscillator Circuits for Crystal Oscillator
Semiconductor Group
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