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T89C51RD2-3CWC-L Datasheet(PDF) 80 Page - ATMEL Corporation |
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T89C51RD2-3CWC-L Datasheet(HTML) 80 Page - ATMEL Corporation |
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80 / 86 page  Rev. F - 15 February, 2001 80 T89C51RD2 9.5.5. External Data Memory Write Cycle Table 43. AC Parameters for a Variable Clock Symbol Type Standard Clock X2 Clock X parameter for -M range X parameter for -L range Units TRLRH Min 6 T - x 3 T - x 20 20 ns TWLWH Min 6 T - x 3 T - x 20 20 ns TRLDV Max 5 T - x 2.5 T - x 25 25 ns TRHDX Min x x 0 0 ns TRHDZ Max 2 T - x T - x 20 20 ns TLLDV Max 8 T - x 4T -x 40 40 ns TAVDV Max 9 T - x 4.5 T - x 60 60 ns TLLWL Min 3 T - x 1.5 T - x 25 25 ns TLLWL Max 3 T + x 1.5 T + x 25 25 ns TAVWL Min 4 T - x 2 T - x 25 25 ns TQVWX Min T - x 0.5 T - x 15 15 ns TQVWH Min 7 T - x 3.5 T - x 15 15 ns TWHQX Min T - x 0.5 T - x 10 10 ns TRLAZ Max x x 0 0 ns TWHLH Min T - x 0.5 T - x 15 15 ns TWHLH Max T + x 0.5 T + x 15 15 ns TQVWH TLLAX ALE PSEN WR PORT 0 PORT 2 A0-A7 DATA OUT ADDRESS OR SFR-P2 TAVWL TLLWL TQVWX ADDRESS A8-A15 OR SFR P2 TWHQX TWHLH TWLWH |
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