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T89C51AC2-RLSI-M 数据表(PDF) 109 Page - ATMEL Corporation |
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T89C51AC2-RLSI-M 数据表(HTML) 109 Page - ATMEL Corporation |
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109 / 117 page ![]() Draft.A - March 30, 2001 109 Preview - Confidential T89C51AC2 18.4.4. External Data Memory Characteristics Table 29. Symbol Description 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 |
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