m28w320bb STMicroelectronics, m28w320bb Datasheet - Page 16

• Manufacturer Part Number: m28w320bb
• Description: 32 Mbit 2mb X16, Boot Block 3v Supply Flash Memory
• Manufacturer: STMicroelectronics

M28W320BT, M28W320BB
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 protected block.
When the Block Protection Status bit is High (set
to ‘1’), a Program or Erase operation has been at-
tempted on a protected block.
Table 7. Status Register Bits
Note: Logic level '1' is High, '0' is Low.
16/43
Bit
7
6
5
4
3
2
1
0
P/E.C. Status
Erase Suspend Status
Erase Status
Program Status
V
Program Suspend Status
Block Protection Status
Reserved
PP
Status
Name
Logic Level
'1'
'0'
'1'
'0'
'1'
'0'
'1'
'0'
'1'
'0'
'1'
'0'
'1'
'0'
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
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.
new
Ready
Busy
Suspended
In progress or Completed
Erase Error
Erase Success
Program Error
Program Success
V
V
Suspended
In Progress or Completed
Program/Erase on protected Block, Abort
No operation to protected blocks
PP
PP
command
Invalid, Abort
OK
Definition
will
appear
to
fail.