M29W256GH7AN6E NUMONYX, M29W256GH7AN6E Datasheet - Page 92

• Manufacturer Part Number: M29W256GH7AN6E
• Description: Flash Mem Parallel 3V/3.3V 256M-Bit 32M x 8/16M x 16 70ns 56-Pin TSOP Tray
• Manufacturer: NUMONYX

Specifications of M29W256GH7AN6E

• Package: 56TSOP
• Cell Type: NOR
• Density: 256 Mb
• Architecture: Sectored
• Block Organization: Symmetrical
• Location Of Boot Block: Bottom|Top
• Typical Operating Supply Voltage: 3|3.3 V
• Sector Size: 128KByte x 256
• Timing Type: Asynchronous
• Operating Temperature: -40 to 85 °C
• Interface Type: Parallel

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Customer lockable extended memory block
A device where the extended memory block is customer lockable is delivered with the DQ7
bit set to ‘0’ and the extended memory block unprotected. It is up to the customer to
program and protect the extended memory block but care must be taken because the
protection of the extended memory block is not reversible.
If the device has not been shipped with the extended memory block factory protected, the
block can be protected by setting the extended memory block protection bit, DQ0, to ‘0’.
However, this bit is one-time programmable and once protected the extended memory block
cannot be unprotected.
Once the extended memory block is programmed, the Exit Extended Memory Block
command must be issued to exit the extended memory block mode and return the device to
read mode.
Table 45.
1. See
000000h-0000FFh
Table 37: Block addresses 0 - 127
x8
Extended memory block address and data
Address
000000h-00007Fh
(1)
x16
and
Table 38: Block addresses 128 -
Security identification number Determined by customer
Factory locked
Data
255.
Customer lockable