M29W128GH70N3E datasheet(19/94 Pages) NUMONYX

Part #	M29W128GH70N3E

Description	128-Mbit (16 Mbit x8 or 8 Mbit x16, page, uniform block) 3 V supply flash memory

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Manufacturer	NUMONYX [Numonyx B.V]

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M29W128GH, M29W128GL

Bus operations

19/94

programmer method (8-bit mode) and Table 7: Read electronic signature - auto select mode

- programmer method (16-bit mode).

These codes can also be accessed by issuing an Auto Select command (see Section 6.1.2:

Auto Select command).

3.7.2

Verify extended memory block protection indicator

The extended memory block is either factory locked or customer lockable.

The protection status of the extended memory block (factory locked or customer lockable)

can be accessed by reading the extended memory block protection indicator. It can be read

in auto select mode using either the programmer (see Table 8 and Table 9) or the in-system

method (see Table 10 and Table 11).

The protection status of the extended memory block is then output on bit DQ7 of the data

input/outputs (see Table 4 and Table 5, Bus operations in 8-bit and 16-bit mode).

3.7.3

Verify block protection status

The protection status of a block can be directly accessed by performing a read operation

with control signals and addresses set as shown in Table 8 and Table 9.

If the block is protected, then 01h (in x 8 mode) is output on data input/outputs DQ0-DQ7,

otherwise 00h is output.

3.7.4

Hardware block protect

The VPP/WP pin can be used to protect the highest or lowest block. When VPP/WP is at VIL

the highest (M29W128GH) or lowest block (M29W128GL) is protected and remains

protected regardless of the block protection status or the reset pin state.

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