M28W320FCT Datasheet, PDF (30/69 Pages) STMicroelectronics – 32 Mbit (2Mb x16, Boot Block) 3V Supply Flash Memory

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
V_PP 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
V_PP Invalid, Abort
V_PP OK
Suspended
In Progress or Completed
Program/Erase on protected Block, Abort
No operation to protected blocks
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