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80C652 датащи(PDF) 18 Page - NXP Semiconductors |
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80C652 датащи(HTML) 18 Page - NXP Semiconductors |
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18 / 25 page ![]() Phlips Semiconductors Product specification 80C652/83C652 CMOS single-chip 8-bit microcontrollers 1996 Aug 15 18 VIH1 0.8V tCHCL tCLCL tCLCH tCLCX tCHCX Figure 6. External Clock Drive at XTAL1 VDD–0.5 0.45V 0.2VDD+0.9 0.2VDD–0.1 NOTE: AC INPUTS DURING TESTING ARE DRIVEN AT VDD–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 7. AC Testing Input/Output VLOAD VLOAD+0.1V VLOAD–0.1V VOH–0.1V VOL+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 VOH/VOL LEVEL OCCURS. IOH/IOL > + 20mA. Figure 8. Float Waveform TIMING REFERENCE POINTS |
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