M58CR064PZB データシートの表示（PDF） - STMicroelectronics
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M58CR064PZB Datasheet PDF : 70 Pages
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M58CR064C, M58CR064D, M58CR064P, M58CR064Q
Once set High, the VPP 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.
Program Suspend Status Bit (SR2). The Pro-
gram Suspend Status bit indicates that a Program
operation has been suspended in the addressed
block. When the Program Suspend Status bit is
High (set to ‘1’), a Program/Erase Suspend com-
mand has been issued and the memory is waiting
for a Program/Erase Resume command. The Pro-
gram Suspend Status should only be considered
valid when the Program/Erase Controller Status
bit is High (Program/Erase Controller inactive).
SR2 is set within 5µs of the Program/Erase Sus-
pend command being issued therefore the memo-
ry 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 (SR1). The Block
Protection Status bit can be used to identify if a
Program or Block 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 (SR0). SR0 is reserved. Its value
must be masked.
Table 8. Status Register Bits
Bit
Name
Type Logic Level
Definition
SR7 P/E.C. Status
’1’
Ready
Status
’0’
Busy
’1’
Erase Suspended
SR6 Erase Suspend Status Status
’0’
Erase In progress or Completed
SR5 Erase Status
Error
’1’
Erase Error
’0’
Erase Success
SR4 Program Status
Error
’1’
Program Error
’0’
Program Success
SR3 VPP Status
Error
’1’
VPP Invalid, Abort
’0’
VPP OK
’1’
Program Suspended
SR2 Program Suspend Status Status
’0’
Program In Progress or Completed
SR1 Block Protection Status Error
’1’
Program/Erase on protected Block, Abort
’0’
No operation to protected blocks
SR0
Note: Logic level ’1’ is High, ’0’ is Low.
Reserved
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