CMOS single-chip 8-bit microcontrollers
1996 Aug 16
AC inputs during testing are driven at VCC –0.5 for a logic ‘1’ and 0.45V for a logic ‘0’.
Timing measurements are made at VIH min for a logic ‘1’ and VIL max for a logic ‘0’.
Figure 10. AC Testing Input/Output
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 VOH/VOL level occurs. IOH/IOL ≥ ±20mA.
Figure 11. Float Waveform
MAX ACTIVE MODE
ICCMAX = 1.5 X FREQ. + 8.0
TYP ACTIVE MODE
MAX IDLE MODE
TYP IDLE MODE
4MHz 8MHz 12MHz 16MHz 20MHz 24MHz 28MHz 32MHz 36MHz
FREQ AT XTAL1
Figure 12. ICC vs. FREQ
Valid only within frequency specifications of the device under test