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C505-2RM Datasheet(PDF) 71 Page - Siemens Semiconductor Group |
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C505-2RM Datasheet(HTML) 71 Page - Siemens Semiconductor Group |
71 / 85 page Semiconductor Group 71 1997-12-01 C505 / C505C C505A / C505CA AC Characteristics (16 MHz, 0.4 to 0.6 Duty Cycle, cont’d) External Data Memory Characteristics Parameter Symbol Limit Values Unit 16-MHz clock Duty Cycle 0.4 to 0.6 Variable Clock 1/CLP= 2 MHz to 16 MHz min. max. min. max. RD pulse width t RLRH 158 – 3 CLP - 30 – ns WR pulse width t WLWH 158 – 3 CLP - 30 – ns Address hold after ALE t LLAX2 48 – CLP - 15 – ns RD to valid data in t RLDV – 100 – 2 CLP+ TCLHmin - 50 ns Data hold after RD t RHDX 0–0 – ns Data float after RD t RHDZ – 51 – CLP - 12 ns ALE to valid data in t LLDV – 200 – 4 CLP - 50 ns Address to valid data in t AVDV – 200 – 4 CLP + TCLHmin -75 ns ALE to WR or RD t LLWL 73 103 CLP + TCLLmin - 15 CLP+ TCLLmin+ 15 ns Address valid to WR t AVWL 95 – 2 CLP - 30 – ns WR or RD high to ALE high t WHLH 10 40 TCLHmin - 15 TCLHmin + 15 ns Data valid to WR transition t QVWX 5 – TCLLmin - 20 – ns Data setup before WR t QVWH 163 – 3 CLP + TCLLmin - 50 –ns Data hold after WR t WHQX 5 – TCLHmin - 20 – ns Address float after RD t RLAZ –0– 0 ns |
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