M28W160ECT, M28W160ECB
gram/Erase Controller Status bit is High (Program/
Erase Controller inactive). Bit 2 is set within 5µs of
the Program/Erase Suspend command being is-
sued therefore the memory may still complete the
operation rather than entering the Suspend mode.
When a Program/Erase Resume command is is-
sued the Program Suspend Status bit returns Low.
Block Protection Status (Bit 1).
The Block Pro-
tection Status bit can be used to identify if a Pro-
gram 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 at-
tempted on a locked block.
Once set High, the Block Protection Status bit can
only be reset Low by a Clear Status Register com-
mand 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.
Reserved (Bit 0).
Bit 0 of the Status Register is
reserved. Its value must be masked.
Note: Refer to
Flowcharts and
Pseudo Codes, for using the Status Register.
Table 10. Status Register Bits
Bit
7
Name
P/E.C. Status
'0'
'1'
6
Erase Suspend Status
'0'
'1'
5
Erase Status
'0'
'1'
4
Program Status
'0'
'1'
3
V
PP
Status
'0'
'1'
2
Program Suspend Status
'0'
'1'
1
0
Block Protection Status
'0'
Reserved
No operation to protected blocks
In Progress or Completed
Program/Erase on protected Block, Abort
Program Success
V
PP
Invalid, Abort
V
PP
OK
Suspended
Erase Success
Program Error
In progress or Completed
Erase Error
Busy
Suspended
Logic Level
'1'
Ready
Definition
Note: Logic level '1' is High, '0' is Low.
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NUMONYX [ NUMONYX B.V ]
