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TMS29LF040 Datasheet(PDF) 33 Page - Texas Instruments

Part # TMS29LF040
Description  524288 BY 8-BIT FLASH MEMORIES
PDF  38 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TMS29LF040 Datasheet(HTML) 33 Page - Texas Instruments

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TMS29LF040, TMS29VF040
524288 BY 8-BIT
FLASH MEMORIES
SMJS825D – SEPTEMBER 1995 – REVISED JUNE 1998
33
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
sector-unprotect operation
Start
End
Yes
No
Protect All Sectors
X = 1
E, G, A9 = VID
A6, A12, A16 = VIH
A9 = VIH or VIL
Write Reset Command
Last
Sector
?
Apply One
10-ms Pulse
E, G, A0 = VIL
W, A6, A1 = VIH
Read Data
Data = 00H
?
X=1000
?
Yes
Yes
No
X = X+1
Sector-Unprotect Failed
No
Select Sector Address
A18, A17, A16
Next Sector
Address
Figure 16. Sector-Unprotect Algorithm



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