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AM29F004B 데이터시트(PDF) 30 Page - SPANSION |
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AM29F004B 데이터시트(HTML) 30 Page - SPANSION |
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30 / 37 page ![]() 28 Am29F004B Am29F004B_00_E4 May 9, 2006 D A TA SH EE T 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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