M28W320 데이터 시트보기 (PDF) - STMicroelectronics

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M28W320

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

STMicroelectronics 

Status Register

M28W320FCT, M28W320FCB

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

7

P/E.C. Status

6

Erase Suspend Status

5

Erase Status

4

Program Status

3

VPP Status

2

Program Suspend Status

1

Block Protection Status

0

Reserved

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

Logic Level (1)

'1'

'0'

'1'

'0'

'1'

'0'

'1'

'0'

'1'

'0'

'1'

'0'

'1'

'0'

Definition

Ready

Busy

Suspended

In progress or Completed

Erase Error

Erase Success

Program Error

Program Success

VPP Invalid, Abort

VPP OK

Suspended

In Progress or Completed

Program/Erase on protected Block, Abort

No operation to protected blocks

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