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AT80C51RA2-RLSIV 数据表(PDF) 65 Page - International Rectifier |
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AT80C51RA2-RLSIV 数据表(HTML) 65 Page - International Rectifier |
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65 / 85 page ![]() 65 4188E–8051–08/06 AT/TS8xC51Rx2 Table 11-7. AC Parameters for a Variable Clock: derating formula 11.5.3 External Program Memory Read Cycle Figure 11-6. External Program Memory Read Cycle Symbol Type Standard Clock X2 Clock -M -V -L Units T LHLL Min 2 T - x T - x 10 8 15 ns T AVLL Min T - x 0.5 T - x 15 13 20 ns T LLAX Min T - x 0.5 T - x 15 13 20 ns T LLIV Max 4 T - x 2 T - x 30 22 35 ns T LLPL Min T - x 0.5 T - x 10 8 15 ns T PLPH Min 3 T - x 1.5 T - x 20 15 25 ns T PLIV Max 3 T - x 1.5 T - x 40 25 45 ns T PXIX Min x x 000 ns T PXIZ Max T - x 0.5 T - x 7 5 15 ns T AVIV Max 5 T - x 2.5 T - x 40 30 45 ns T PLAZ Max x x 101010 ns TPLIV TPLAZ ALE PSEN PORT 0 PORT 2 A0-A7 A0-A7 INSTR IN INSTR IN INSTR IN ADDRESS OR SFR-P2 ADDRESS A8-A15 ADDRESS A8-A15 12 TCLCL TAVIV T LHLL T AVLL T LLIV T LLPL TPLPH TPXAV T PXIX T PXIZ T LLAX |
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