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.
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