ES29LV160F Datasheet, PDF (65/71 Pages) Excel Semiconductor Inc. – 16 Megabit (2 M x 8-Bit/1 M x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory

ES29LV160F
Excel Semiconductor Inc.
Fig. A3 Security Sector Protection Verify
Start
RESET# =
V_ID
Wait 1us
Write 60h to
any address
Write 40h to
Security sector
address with
A6=0,A1=1,A0=1
Read from
security address
with
A6=0,A1=1,A0=0
If data=00h,
security sector is
unprotected.
If data=01h,
security sector is
protected
Remove V_ID from
RESET#
Write reset
command
Security sector
Protect Verify
complete
Exit from the Security Sector
Once the Security Sector is locked protected and verified, the system must write the Exit Security
Sector Region command sequence to return to reading and writing the remainder of the array.
Caution for the Security Sector Protection
The security sector protection must be used with caution since, once protected, there is no
procedure available for unprotecting the security sector area and none of the bits in the security
sector memory space can be modified in any way.
Rev.0A (Dec 12, 2007) 65