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AT89C51ED2-RDTIM 数据表(PDF) 124 Page - ATMEL Corporation |
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AT89C51ED2-RDTIM 数据表(HTML) 124 Page - ATMEL Corporation |
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124 / 137 page  124 AT89C51RD2/ED2 4235E–8051–04/04 Table 84. AC Parameters for a Fix Clock Table 85. AC Parameters for a Variable Clock Shift Register Timing Waveforms External Clock Drive Waveforms Symbol -M Units Min Max 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 T XLXL Min 12 T 6 T ns T QVHX Min 10 T - x 5 T - x 50 ns T XHQX Min 2 T - x T - x 20 ns T XHDX Min x x 0 ns T XHDV Max 10 T - x 5 T- x 133 ns INPUT DATA VALID VALID VALID VALID 01 2345 6 8 7 ALE CLOCK OUTPUT DATA WRITE to SBUF CLEAR RI TXLXL TQVXH TXHQX TXHDV TXHDX SET TI SET RI INSTRUCTION 01 2345 67 VALID VALID VALID VALID V CC-0.5V 0.45V 0.7VCC 0.2V CC-0.1 TCHCL TCLCX TCLCL TCLCH TCHCX |
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