M29DW641F datasheet(37/80 Pages) NUMONYX

Part #	M29DW641F

Description	64 Mbit (4Mb x16, Multiple Bank, Page, Boot Block) 3V Supply Flash Memory

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Manufacturer	NUMONYX [Numonyx B.V]

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M29DW641F

Command interface

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6.3.16

Clear Lock bit command

The Clear Lock bit command individually clears (sets to ‘0’) the Lock bit for a given block or

group of blocks.

If the Non-Volatile Lock bit for the same block or group of blocks is set, the block or group of

blocks remains locked (see

Table 7: Block Protection status).

6.3.17

Verify Lock bit command

The status of a Lock bit for a given block can be read by issuing a Verify Lock bit command

along with the block address.

6.3.18

Set Lock-Down bit command

This command is used to set the Lock-Down bit to ‘1’ thus protecting the Non-Volatile Modify

Protection bits from program and erase.

There is no Unprotect Lock-Down bit command.

6.3.19

Verify Lock-Down bit command

This command is used to read the status of the Lock-Down bit. The status is output on bit

DQ1. If DQ1 is ‘1’, all the Non-Volatile Modify Protection bits are protected from Program or

Erase Operations.

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