M58LT256JSB8ZA6 STMICROELECTRONICS [STMicroelectronics], M58LT256JSB8ZA6 Datasheet - Page 34

• Manufacturer Part Number: M58LT256JSB8ZA6
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Status Register
5.3
5.4
5.5
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Erase/Blank Check Status bit (SR5)
The Erase/Blank Check Status bit is used to identify if there was an error during a Block
Erase operation. When the Erase/Blank Check Status bit is High (set to ‘1’), the
Program/Erase Controller has applied the maximum number of pulses to the block and still
failed to verify that it has erased correctly.
The Erase/Blank Check Status bit should be read once the Program/Erase Controller Status
bit is High (Program/Erase Controller inactive).
The Erase/Blank Check Status bit is also used to indicate whether an error occurred during
the Blank Check operation: if the data at one or more locations in the block where the Blank
Check command has been issued is different from FFFFh, SR5 is set to '1'.
Once set High, the Erase/Blank Check Status bit must be set Low by a Clear Status
Register command or a hardware reset before a new erase command is issued, otherwise
the new command will appear to fail.
Program Status bit (SR4)
The Program Status bit is used to identify if there was an error during a program operation.
The Program Status bit should be read once the Program/Erase Controller Status bit is High
(Program/Erase Controller inactive).
When the Program Status bit is High (set to ‘1’), the Program/Erase Controller has applied
the maximum number of pulses to the word and still failed to verify that it has programmed
correctly.
Once set High, the Program Status bit must be set Low by a Clear Status Register
command or a hardware reset before a new program command is issued, otherwise the new
command will appear to fail.
V
The V
erase operations. The V
operation. Program and erase operations are not guaranteed if V
an operation.
When the V
voltage.
When the V
Lockout Voltage, V
be performed.
Once set High, the V
a hardware reset before a new program or erase command is issued, otherwise the new
command will appear to fail.
PP
PP
Status bit (SR3)
Status bit is used to identify an invalid voltage on the V
PP
PP
Status bit is Low (set to ‘0’), the voltage on the V
Status bit is High (set to ‘1’), the V
PPLK
PP
, the memory is protected and program and erase operations cannot
Status bit must be set Low by a Clear Status Register command or
PP
pin is only sampled at the beginning of a program or erase
PP
pin has a voltage that is below the V
M58LT256JST, M58LT256JSB
PP
PP
PP
pin was sampled at a valid
pin during program and
becomes invalid during
PP