ES29LV160F Datasheet, PDF (18/71 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.
7.10 Sector Protection/Unprotection
The hardware sector protection feature disables both program and erase operations in any sector.
The hardware sector unprotection feature re-enables both program and erase operations in
previously protected sectors.
The device is shipped with all sectors unprotected. ESI offers the option of programming and
protecting sectors at its factory prior to shipping the device through ESI’s High-way™ Service.
Contact a ESI representative for details.
It is possible to determine whether a sector is protected or unprotected. See Autoselect Mode on
page 17 for details.
Sector protection/unprotection can be implemented via two methods.
The primary method requires VID on the RESET# pin only, and can be implemented either in-
system or via programming equipment. Figure 7.3 on page 20 shows the algorithms and Figure
17.12 on page 53 shows the timing diagram. This method uses standard microprocessor bus cycle
timing. For sector unprotect, all unprotected sectors must first be protected prior to the first sector
unprotect write cycle.
Rev.0A (Dec 12, 2007) 18