M29DW641F70N1 NUMONYX [Numonyx B.V], M29DW641F70N1 Datasheet - Page 72
M29DW641F70N1
Manufacturer Part Number
M29DW641F70N1
Description
64 Mbit (4Mb x16, Multiple Bank, Page, Boot Block) 3V Supply Flash Memory
Manufacturer
NUMONYX [Numonyx B.V]
Datasheet
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Extended Memory Block
C.2
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Customer Lockable section of the Extended Block
The device is delivered with the second section of the Extended Block "Customer Lockable":
bits DQ7 and DQ6 are set to '1' and '0' respectively. It is up to the customer to program and
protect this section of the Extended Block but care must be taken because the protection is
not reversible.
There are three ways of protecting this section:
●
●
●
Bit DQ6 of the Extended Block Protection indicator is automatically set to '1' to indicate that
the second section of the Extended Block is Customer Locked.
Once the Extended Block is programmed and protected, the Exit Extended Block command
must be issued to exit the Extended Block mode and return the device to Read mode.
Table 35.
1. See
2. ENS = Electronic Serial Number.
M29DW641F
Issue the Enter Extended Block command to place the device in Extended Block mode,
then use the In-System Technique with RP either at V
In-system technique
corresponding flowcharts
technique).
Issue the Enter Extended Block command to place the device in Extended Block mode,
then use the Programmer Technique. Refer to
Appendix D: High voltage Block Protection
Figure 22
Issue a Set Extended Block Protection bit command to program the Extended Block
Protection bit to ‘1’ thus preventing the second section of the Extended Block from
being programmed.
Device
Table 28: Block Addresses
Extended Block Address and Data
and
000000h-00003Fh
000040h-00007Fh
Figure 23
Address
in
Appendix D: High voltage Block Protection
.
(1)
for a detailed explanation of the technique).
Figure 24
Security Identification Number, ESN
and
Figure 25
Random Number,
, and to the corresponding flowcharts
Factory Locked
Unavailable
Section D.1: Programmer technique
for a detailed explanation of the
IH
or at V
Data
ID
. Refer to
(2)
, and to the
Determined by
Unavailable
M29DW641F
Customer
Lockable
Customer
Section D.2:
in
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