14
0368G–MICRO–6/05
AT89C2051
21. Shift Register Mode Timing Waveforms
22. AC Testing Input/Output Waveforms
Note:
1. AC Inputs during testing are driven at V
CC
- 0.5V for a logic 1 and 0.45V for a logic 0. Timing measurements are made at V
IH
min. for a logic 1 and V
IL
max. for a logic 0.
23. Float Waveforms
Note:
1. For timing purposes, a port pin is no longer floating when a 100 mV change from load voltage occurs. A port pin begins to
float when 100 mV change from the loaded V
OH
/V
OL
level occurs.
Содержание AT89C2051
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