AM29PDL129H AMD [Advanced Micro Devices], AM29PDL129H Datasheet - Page 23

• Manufacturer Part Number: AM29PDL129H
• Description: 128 Megabit (8 M x 16-Bit) CMOS 3.0 Volt-only, Page Mode Simultaneous Read/Write Flash Memory with Enhanced VersatileIO
• Manufacturer: AMD [Advanced Micro Devices]

tion of the two. Because only AMD can program and
protect the factory-locked area, this method ensures
the security of the ESN once the product is shipped to
the field. Contact an AMD representative for details on
using AMD’s ExpressFlash service. Note that the ACC
function and unlock bypass modes are not available
when the SecSi Sector is enabled.
Customer-Lockable Area (64 words)
The customer-lockable area of the SecSi Sector
(000040h-00007Fh) is shipped unprotected, which al-
lows the customer to program and optionally lock the
area as appropriate for the application. The SecSi
Sector Customer-locked Indicator Bit (DQ6) is shipped
as “0” and can be permanently locked to “1” by issuing
November 2, 2005
Am29PDL129H
the SecSi Protection Bit Program Command. The
SecSi Sector can be read any number of times, but
can be programmed and locked only once. Note that
the accelerated programming (ACC) and unlock by-
pass functions are not available when programming
the SecSi Sector.
The Customer-lockable area can be protected using
one of the following procedures:
Follow the SecSi Sector Protection Algorithm as
shown in . This allows in-system protection of the
SecSi Sector without raising any device pin to a high
voltage. Note that this method is only applicable to the
SecSi Sector.
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