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AT80C51RA2-RLSIV 数据表(PDF) 66 Page - ATMEL Corporation |
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AT80C51RA2-RLSIV 数据表(HTML) 66 Page - ATMEL Corporation |
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66 / 86 page ![]() 66 4188F–8051–01/08 AT/TS8xC51Rx2 11.5.4 External Data Memory Characteristics Table 11-8. AC Parameters for a Fix Clock Symbol Parameter TRLRH RD Pulse Width TWLWH WR Pulse Width TRLDV RD to Valid Data In TRHDX Data Hold After RD TRHDZ Data Float After RD TLLDV ALE to Valid Data In TAVDV Address to Valid Data In TLLWL ALE to WR or RD TAVWL Address to WR or RD TQVWX Data Valid to WR Transition TQVWH Data set-up to WR High TWHQX Data Hold After WR TRLAZ RD Low to Address Float TWHLH RD or WR High to ALE high Speed -M 40 MHz -V X2 mode 30 MHz 60 MHz equiv. -V standard mode 40 MHz -L X2 mode 20 MHz 40 MHz equiv. -L standard mode 30 MHz Units Symbol Min Max Min Max Min Max Min Max Min Max TRLRH 130 85 135 125 175 ns TWLWH 130 85 135 125 175 ns TRLDV 100 60 102 95 137 ns TRHDX 0 0 0 0 0 ns TRHDZ 30 18 35 25 42 ns TLLDV 160 98 165 155 222 ns TAVDV 165 100 175 160 235 ns TLLWL 50 100 30 70 55 95 45 105 70 130 ns TAVWL 75 47 80 70 103 ns TQVWX 10 7 15 5 13 ns TQVWH 160 107 165 155 213 ns TWHQX 15 9 17 10 18 ns TRLAZ 0 0 0 0 0 ns TWHLH 10 40 7 27 15 35 5 45 13 53 ns |
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