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UPD70741 Datasheet(PDF) 84 Page - NEC |
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UPD70741 Datasheet(HTML) 84 Page - NEC |
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84 / 112 page  µPD70741 84 (e) Write timing (high-speed page access: on-page) (1/2) Parameter Symbol Conditions MIN. MAX. Unit CAS precharge time 72 tCP 0.5T - 10 ns RAS hold width (write) 80 tRSH 1.5T - 20 ns CAS pulse width (write) 81 tCAS 1T - 15 ns Column address setup time (write) 83 tASC (w + 0.5)T - 15 ns Column address hold time (write) 84 tCAH 1T - 15 ns Write command hold time 85 tWCH 0.5T - 10 ns Write command read time relative to RAS 86 tRWL 1.5T ns Write command read time relative to CAS 87 tCWL 1T ns Data setup time (relative to CAS ↓) 88 tDS 0.5T - 15 ns Data hold time (relative to CAS ↓) 89 tDH 1T - 20 1T + 10 ns Write command setup time 90 tWCS 0.5T - 15 ns Cycle time in high-speed page mode 91 tPC 1.5T - 10 ns Remark T: tCYK w: 0 |
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