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M29W008AT Datasheet(PDF) 10 Page - STMicroelectronics

Part No. M29W008AT
Description  8 Mbit 1Mb x8, Boot Block Low Voltage Single Supply Flash Memory
Download  30 Pages
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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M29W008AT Datasheet(HTML) 10 Page - STMicroelectronics

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Table 10. Status Register Bits
Note:
Logic level ’1’ is High, ’0’ is Low. -0-1-0-0-0-1-1-1-0- represent bit value in successive Read operations.
DQ
Name
Logic Level
Definition
Note
7
Data
Polling
’1’
Erase Complete or erase block
in Erase Suspend
Indicates the P/E.C. status, check during
Program or Erase, and on completion before
checking bits DQ5 for program or Erase
Success.
’0’
Erase On-going
DQ
Program Complete or data of
non erase block during Erase
Suspend
DQ
Program On-going
6
Toggle Bit
’-1-0-1-0-1-0-1-’
Erase or Program On-going
Successive reads output complementary
data on DQ6 while Programming or Erase
operations are on-going. DQ6 remains at
constant level when P/E.C. operations are
completed or Erase Suspend is
acknowledged.
DQ
Program Complete
’-1-1-1-1-1-1-1-’
Erase Complete or Erase
Suspend on currently
addressed block
5
Error Bit
’1’
Program or Erase Error
This bit is set to ‘1’ in the case of
Programming or Erase failure.
’0’
Program or Erase On-going
4
Reserved
3
Erase
Time Bit
’1’
Erase Timeout Period Expired
P/E.C. Erase operation has started. Only
possible command entry is Erase Suspend
(ES).
’0’
Erase Timeout Period On-going
An additional block to be erased in parallel
can be entered to the P/E.C.
2
Toggle Bit
’-1-0-1-0-1-0-1-’
Chip Erase, Erase or Erase
Suspend on the currently
addressed block.
Erase Error due to the currently
addressed block
(when DQ5 = ‘1’).
Indicates the erase status and allows to
identify the erased block.
1
Program on-going, Erase on-
going on another block or
Erase Complete
DQ
Erase Suspend read on non
Erase Suspend block
1
Reserved
0
Reserved


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