m29dw128f-70za6t Numonyx, m29dw128f-70za6t Datasheet - Page 84

• Manufacturer Part Number: m29dw128f-70za6t
• Description: 128 Mbit 16mb X8 Or 8mb X16, Multiple Bank, Page, Boot Block 3v Supply Flash Memory
• Manufacturer: Numonyx

Extended Memory Block
C.2
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 41.
1. See
2. ESN = Electronic Serial Number.
84/94
M29DW128F
Device
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
Appendix D: High Voltage Block Protection
Figure 26
Issue the Enter Extended Block command to place the device in Extended Block mode, then use the
Programmer Technique. Refer to
Block Protection
explanation of the technique).
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.
Table 34: Block Addresses and Protection Groups
Customer Lockable Section of the Extended Block
Extended Block Address and Data
for a detailed explanation of the technique).
000000h-
000080h-
00007Fh
0000FFh
, and to the corresponding flowcharts
x8
Address
(1)
000000h-
000040h-
Section D.1: Programmer technique
00003Fh
00007Fh
x16
IH
.
, and to the corresponding flowcharts
or at V
Security Identification Number
ID
Random Number, ESN
. Refer to
Figure 23
Factory Locked
Unavailable
Section D.2: In-System technique
and
Figure 24
in
Data
(2)
Appendix D: High Voltage
,
for a detailed
Customer Lockable
Figure 25
Determined by
Unavailable
Customer
M29DW128F
and
in