MX29LV640BT Macronix International, MX29LV640BT Datasheet - Page 54

• Manufacturer Part Number: MX29LV640BT
• Description: 64M-BIT [8M x 8/4M x 16] SINGLE VOLTAGE 3V ONLY FLASH MEMORY
• Manufacturer: Macronix International

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Figure 18. CHIP UNPROTECT FLOWCHART (A9, OE# Control)
P/N:PM1076
Sector Addr
Increment
* It is recommended before unprotect whole chip, all sectors should be protected in advance.
No
Set Up First Sector Addr
Read Data from Device
Write Reset Command
Remove VID from A9
Set OE#=CE#=VIL
Activate WE# Pulse
Protect All Sectors
Time Out 15ms
Set OE#=A9=VID
A9=VID, A1=1
All sectors have
CE#=VIL, A6=1
been verified?
PLSCNT=1
Chip Unprotect
Data=00H?
START
Complete
54
Yes
Yes
MX29LV640BT/BB
No
PLSCNT=1000?
Device Failed
Increment
PLSCNT
Yes
No
REV. 1.2, SEP. 07, 2005