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AM29F004B датащи(PDF) 30 Page - Advanced Micro Devices |
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AM29F004B датащи(HTML) 30 Page - Advanced Micro Devices |
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30 / 37 page ![]() 28 Am29F004B 8/5/05 AD VA NC E IN FO RM AT ION AC CHARACTERISTICS Figure 16. Sector Unlock Sequence Timing Diagram Figure 17. Sector Relock Timing Diagram Parameter All Speed Options JEDEC Std. Description Unit tVIDR VID Rise and Fall Time (Not 100% tested) Min 500 ns OE# A18 – A0 D7 – D0 CE# WE# AAh 555h 55h 2AAh 20h/24h 555h tVIDR If 20h is written, Sector Unprotect mode is enabled. If 24h is written, command mode Sector Protect/Unprotect is enabled. Device is ready to read from array. VID VSS, VIL or VIH OE# A18 – A0 D7 – D0 CE# WE# 90h XXXh F0h or 00h XXXh tVIDR VID VSS, VIL or VIH tVIDR 0 V or 5 V Device exits Temporary Sector Unprotect mode or command mode Sector Protect/Unprotect. Returns to reading array data. Device is in either Temporary Sector Unprotect mode or command mode Sector Protect/Unprotect. |
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