m58lw032a STMicroelectronics, m58lw032a Datasheet - Page 27

• Manufacturer Part Number: m58lw032a
• Description: 32 Mbit 2mb X16, Uniform Block, Burst 3v Supply Flash Memory
• Manufacturer: STMicroelectronics

failed. Depending on the cause of the failure other
Status Register bits may also be set to High, V
Once set High, the Program Status bit can only be
reset Low by a Clear Status Register command or
a hardware reset. If set High it should be reset be-
fore a new Program or Erase command is issued,
otherwise the new command will appear to fail.
V
used to identify if a Word Program, Erase, Block
Protection or Blocks Unprotection operation has
been attempted when V
Status bit cannot be used during a Write to Buffer
and Program operation.
When the V
gram, Erase, Block Protection or Blocks Unprotec-
tion operations have been attempted with V
Low, V
mand, or hardware reset. When the V
is High, V
tection or Blocks Unprotection operation has been
attempted with V
Once set High, the V
by a Clear Status Register command or a hard-
ware reset. If set High it should be reset before a
new Program, Erase, Block Protection or Blocks
PP
If only the Program Status bit (bit 4) is set High,
V
applied the maximum number of pulses to the
byte and still failed to verify that the Write Buffer
has programmed correctly or that the Block is
protected.
If the failure is due to a program or block protect
with V
also set High, V
If the failure is due to a program on a protected
block then Block Protection Status bit (bit 1) is
also set High, V
If the failure is due to a program or erase
incorrect command sequence then Erase
Status bit (bit 5) is also set High, V
OH
Status (Bit 3). The V
, then the Program/Erase Controller has
IL
, since the last Clear Status Register com-
PP
OH
PP
low, V
, a Word Program, Erase, Block Pro-
Status bit is Low, V
PP
OL
OH
OH
Low, V
, then V
PP
.
.
Status bit can only be reset
PP
IL
PP
PP
is Low, V
.
Status bit can be
Status bit (bit 3) is
OL
, no Word Pro-
OH
PP
IL
. The V
.
Status bit
OH
PP
PP
.
a Program/Erase Suspend command has been is-
sued and the memory is waiting for a Program/
Erase Resume command.
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 Low, V
no Program or Erase operations have been at-
tempted to protected blocks since the last Clear
Status Register command or hardware reset;
when the Block Protection Status bit is High, V
a Program (Program Status bit 4 set High) or
Erase (Erase Status bit 5 set High) operation has
been attempted on a protected 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 Program or Erase command is
issued, otherwise the new command will appear to
fail.
Reserved (Bit 0). Bit 0 of the Status Register is
reserved. Its value should be masked.
Unprotection command is issued, otherwise the
new command will appear to fail.
Program Suspend Status (Bit 2). The Program
Suspend Status bit indicates that a Program oper-
ation has been suspended and is waiting to be re-
sumed. The Program Suspend Status should only
be considered valid when the Program/Erase
Controller Status bit is High (Program/Erase Con-
troller inactive); after a Program/Erase Suspend
command is issued the memory may still complete
the operation rather than entering the Suspend
mode.
When the Program Suspend Status bit is Low,
V
completed its operation; when the bit is High, V
OL
, the Program/Erase Controller is active or has
M58LW032A
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OH
OH
OL
,
,
,