M28W320FCT datasheet(30/69 Pages) NUMONYX

Part #	M28W320FCT

Description	32 Mbit (2Mb x16, Boot Block) 3V Supply Flash Memory

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Manufacturer	NUMONYX [Numonyx B.V]

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Status Register

M28W320FCT, M28W320FCB

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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 pseudo codes, for using the Status Register.

Table 11.

Status Register Bits

Bit

Name

Logic Level (1)

Definition

7

P/E.C. 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

1.

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

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