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AT89C51ED2-RDTIM Datasheet(PDF) 122 Page - ATMEL Corporation |
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AT89C51ED2-RDTIM Datasheet(HTML) 122 Page - ATMEL Corporation |
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122 / 137 page  122 AT89C51RD2/ED2 4235E–8051–04/04 Table 81. AC Parameters for a Fix Clock Symbol -M Units Min Max T RLRH 125 ns TWLWH 125 ns TRLDV 95 ns TRHDX 0ns T RHDZ 25 ns T LLDV 155 ns T AVDV 160 ns TLLWL 45 105 ns TAVWL 70 ns T QVWX 5ns TQVWH 155 ns T WHQX 10 ns T RLAZ 0ns TWHLH 545 ns Table 82. AC Parameters for a Variable Clock Symbol Type Standard Clock X2 Clock X parameter for -M range Units TRLRH Min 6 T - x 3 T - x 25 ns TWLWH Min 6 T - x 3 T - x 25 ns TRLDV Max 5 T - x 2.5 T - x 30 ns T RHDX Min x x 0 ns T RHDZ Max 2 T - x T - x 25 ns TLLDV Max 8 T - x 4T -x 45 ns TAVDV Max 9 T - x 4.5 T - x 65 ns TLLWL Min 3 T - x 1.5 T - x 30 ns TLLWL Max 3 T + x 1.5 T + x 30 ns T AVWL Min 4 T - x 2 T - x 30 ns T QVWX Min T - x 0.5 T - x 20 ns TQVWH Min 7 T - x 3.5 T - x 20 ns TWHQX Min T - x 0.5 T - x 15 ns TRLAZ Max x x 0 ns T WHLH Min T - x 0.5 T - x 20 ns T WHLH Max T + x 0.5 T + x 20 ns |
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