80C528 Datasheet, PDF (18/26 Pages) NXP Semiconductors – CMOS single-chip 8-bit microcontroller

Philips Semiconductors
CMOS single-chip 8-bit microcontrollers
Product specification
80C528/83C528
V_DD–0.5
0.45V
0.7V_DD
0.2V_DD–0.1
t_CHCL
t_CLCX
t_CHCX
t_CLCH
t_CLCL
Figure 6. External Clock Drive
V_DD–0.5
0.2V_DD+0.9
0.45V
0.2V_DD–0.1
NOTE:
AC inputs during testing are driven at V_DD –0.5 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 for a logic ’0’.
Figure 7. AC Testing Input/Output
V_LOAD
V_LOAD+0.1V
V_LOAD–0.1V
TIMING
REFERENCE
POINTS
V_OH–0.1V
V_OL+0.1V
NOTE:
For timing purposes, a port is no longer floating when a 100mV change from load
voltage occurs, and begins to float when a 100mV change from the loaded V_OH/
V_OL level occurs. I_OH/I_OL ≥ ± 20mA.
Figure 8. Float Waveform
1995 Feb 02
18