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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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AT89C51AC3-RDTUM 数据表(PDF) 130 Page - ATMEL Corporation |
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AT89C51AC3-RDTUM 数据表(HTML) 130 Page - ATMEL Corporation |
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130 / 143 page  130 AT89C51AC3 4383B–8051–01/05 Table 80. AC Parameters for a Fix Clock (F = 40 MHz) Table 81. AC Parameters for a Variable Clock Shift Register Timing Waveforms External Clock Drive Characteristics (XTAL1) Table 82. AC Parameters Symbol Min Max Units TXLXL 300 ns TQVHX 200 ns TXHQX 30 ns TXHDX 0ns TXHDV 117 ns Symbol Type Standard Clock X2 Clock X parameter for -M range Units TXLXL Min 12 T 6 T ns TQVHX Min 10 T - x 5 T - x 50 ns TXHQX Min 2 T - x T - x 20 ns TXHDX Min x x 0 ns TXHDV Max 10 T - x 5 T- x 133 ns VALID VALID VALID VALID VALID VALID INPUT DATA VALID 01 234 5 6 8 7 ALE CLOCK OUTPUT DATA WRITE to SBUF CLEAR RI TXLXL TQVXH TXHQX TXHDV TXHDX SET TI SET RI INSTRUCTION 0 1 2 345 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 % |
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