M28W640HCT70ZB6E datasheet(30/72 Pages) NUMONYX

Part #	M28W640HCT70ZB6E

Description	64 Mbit (4 Mb x 16, boot block) 3 V supply Flash memory

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Manufacturer	NUMONYX [Numonyx B.V]

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Status Register

M28W640HCT, M28W640HCB

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6.7

Block Protection status (bit 1)

The Block Protection status bit can be used to identify if a program or erase operation has

tried to modify the contents of a locked block.

When the Block Protection status bit is High (set to ‘1’), a program or erase operation has

been attempted on a locked block.

Once set High, the Block Protection status bit can only be reset Low by a Clear Status

Register command or a hardware reset. If set High it should be reset before a new

command is issued, otherwise the new command will appear to fail.

6.8

Reserved (bit 0)

Bit 0 of the Status Register is reserved. Its value must be masked.

Note:

Refer to Appendix C: Flowcharts and pseudocodes, for using the Status Register.

Table 11.

Status Register bits(1)

1.

Logic level '1' is High, '0' is Low.

Bit

Name

Logic level

Definition

7

P/E.controller status

'1'

Ready

'0'

Busy

6

Erase Suspend status

'1'

Suspended

'0'

In progress or completed

5

Erase status

'1'

Erase error

'0'

Erase success

4

Program status

'1'

Program error

'0'

Program success

3VPP status

'1'

VPP invalid, abort

'0'

VPP OK

2

Program Suspend status

'1'

Suspended

'0'

In progress or completed

1

Block Protection status

'1'

Program/Erase on protected Block,

abort

'0'

No operation to protected blocks

0

Reserved

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