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AT89C51CC02CA-RATUM Datasheet(PDF) 144 Page - ATMEL Corporation |
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AT89C51CC02CA-RATUM Datasheet(HTML) 144 Page - ATMEL Corporation |
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144 / 159 page  144 AT/T89C51CC02 4126L–CAN–01/08 Shift Register Timing Waveforms External Clock Drive Characteristics (XTAL1) Table 119. AC Parameters External Clock Drive Waveforms AC Testing Input/Output Waveforms AC inputs during testing are driven at V CC - 0.5 for a logic “1” and 0.45V for a logic “0”. Timing measurement are made at V IH min for a logic “1” and VIL max for a logic “0”. Float Waveforms VALID VALID VALID VALID VALID VALID INPUT DATA VALID 01 2345 6 8 7 CLOCK OUTPUT DATA WRITE to SBUF CLEAR RI T XLXL TQVXH T XHQX T XHDV TXHDX SET TI SET RI INSTRUCTION 0 1 2345 67 VALID Symbol Parameter Min Max Units TCLCL Oscillator Period 25 ns TCHCX High Time 5 ns TCLCX Low Time 5 ns TCLCH Rise Time 5 ns TCHCL Fall Time 5 ns TCHCX/TCLCX Cyclic ratio in X2 Mode 40 60 % VCC-0.5V 0.45V 0.7V CC 0.2VCC-0.1 T CHCL TCLCX T CLCL T CLCH TCHCX INPUT/OUTPUT 0.2 V CC + 0.9 0.2 VCC - 0.1 V CC -0.5V 0.45 V FLOAT V OH - 0.1V VOL + 0.1V V LOAD VLOAD + 0.1V VLOAD - 0.1V |
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