80C32/80C52

Rev. G (14 Jan. 97)

18

MATRA MHS

External Clock Drive Characteristics (XTAL1)

SYMBOL

PARAMETER

MIN

MAX

UNIT

FCLCL

Oscillator Frequency

44

MHz

TCLCL

Oscillator period

22.7

ns

TCHCX

High Time

5

ns

TCLCX

Low Time

5

ns

TCLCH

Rise Time

5

ns

TCHCL

Fall Time

5

ns

External Clock Drive Waveforms

AC Testing Input/Output Waveforms

AC inputs during testing are driven at Vcc – 0.5 for a logic “1” and 0.45 V for a logic “0”. Timing measurements are

made at VIH min for a logic “1” and VIL max for a logic “0”.

Float Waveforms

For timing purposes as port pin is no longer floating when a 100 mV change from load voltage occurs and begins to

float when a 100 mV change from the loaded VOH/VOL level occurs. Iol/IoH

≥ ± 20 mA.