Datasheet

51
3286P–MICRO–3/10
AT89S8253
38. Shift Register Mode Timing Waveforms
39. AC Testing Input/Output Waveforms
(1)
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.
40. Float Waveforms
(1)
37. Serial Port Timing: Shift Register Mode Test Conditions
Symbol Parameter
Variable Oscillator
UnitsMin Max