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Part Name
Description
29F4000 View Datasheet(PDF) - Macronix International
Part Name
Description
Manufacturer
29F4000
4M-BIT [512KX8] CMOS EQUAL SECTOR FLASH MEMORY
Macronix International
29F4000 Datasheet PDF : 36 Pages
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MX29F4000
SECTOR PROTECTION ALGORITHM FOR SYSTEM WITHOUT 12V
START
PLSCNT=1
Write "unlock for sector protect/unprotect"
Command(Table1)
Set Up Sector Addr
(A18, A17, A16)
OE=VIH,A9=VIH
CE=VIL,A6=VIL
Activate WE Pulse to start
Data don't care
Increment PLSCNT
No
Toggle bit checking
No
Q6 not Toggled
.
Yes
Set CE=OE=VIL
A9=VIH
Read from Sector
Addr=SA, A1=1
No
PLSCNT=32?
Yes
Device Failed
Data=01H?
Protect Another
Yes
Sector?
Write Reset Command
Sector Protection
Complete
P/N:PM0629
REV. 1.0, DEC. 20, 1999
30
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