MX29LV640BU Macronix International, MX29LV640BU Datasheet - Page 50

• Manufacturer Part Number: MX29LV640BU
• Description: 64M-BIT [4M x 16] CMOS EQUAL SECTOR FLASH MEMORY
• Manufacturer: Macronix International

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Figure 18. CHIP UNPROTECT FLOWCHART (A9, OE# Control)
P/N:PM1081
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
All sectors have
Set OE#=A9=VID
CE#=VIL,A6=1
A9=VID,A1=1
been verified?
Chip Unprotect
PLSCNT=1
Data=00H?
START
Complete
50
Yes
Yes
MX29LV640BU
No
PLSCNT=1000?
Device Failed
Increment
PLSCNT
Yes
No
REV. 1.0, MAR. 08, 2005