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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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AT89C51CC02CA-RATUM 数据表(PDF) 144 Page - ATMEL Corporation |
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AT89C51CC02CA-RATUM 数据表(HTML) 144 Page - ATMEL Corporation |
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144 / 156 page  144 AT/T89C51CC02 4126J–CAN–05/06 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 0123 4 5 6 8 7 CLOCK OUTPUT DATA WRITE to SBUF CLEAR RI TXLXL T QVXH TXHQX TXHDV T XHDX SET TI SET RI INSTRUCTION 0 1 2 3 4567 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 0.7VCC 0.2VCC-0.1 TCHCL TCLCX TCLCL TCLCH TCHCX INPUT/OUTPUT 0.2 VCC + 0.9 0.2 V CC - 0.1 VCC -0.5V 0.45 V FLOAT VOH - 0.1V V OL + 0.1V V LOAD V LOAD + 0.1V V LOAD - 0.1V |
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