SAB80C166W Datasheet, PDF (49/67 Pages) Siemens Semiconductor Group – C16x-Family of High-Performance CMOS 16-Bit Microcontrollers

Testing Waveforms
SAB 80C166W/83C166W
AC inputs during testing are driven at 2.4 V for a logic ‘1’ and 0.4 V for a logic ‘0’.
Timing measurements are made at V_IH min for a logic ‘1’ and V_IL max for a logic ‘0’.
Figure 9
Input Output Waveforms
For timing purposes a port pin is no longer floating when a 100 mV change from load
voltage occurs, but begins to float when a 100 mV change from the loaded V_OH/V_OL level occurs
(I_OH/I_OL = 20 mA).
Figure 10
Float Waveforms
Memory Cycle Variables
The timing tables below use three variables which are derived from registers SYSCON and
BUSCON1 and represent the special characteristics of the programmed memory cycle. The
following table describes, how these variables are to be computed.
Description
ALE Extension
Memory Cycle Time Waitstates
Memory Tristate Time
Symbol Values
t_A
T_CL x <ALECTL>
t_C
2T_CL x (15 - <MCTC>)
t_F
2T_CL x (1 - <MTTC>)
Semiconductor Group
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