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參數資料
| 型號： | M29W008ET90N6E |
| 廠商： | 意法半導體 |
| 英文描述： | 8 Mbit (1Mb x 8, Boot Block) 3V Supply Flash Memory |
| 中文描述： | 8兆（1兆× 8，引導塊）3V電源快閃記憶體 |
| 文件頁數： | 20/43頁 |
| 文件大?。?/td> | 282K |
| 代理商： | M29W008ET90N6E |
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5 Status register
M29W008ET, M29W008EB
20/43
5
Status register
The status of the Program/Erase Controller during command execution is indicated by bit DQ7
(Data Polling bit), Toggle bits DQ6 and DQ2 and Error bits DQ3 and DQ5. Any attempt to read
the memory array during Program or Erase command execution will automatically output these
five Status Register bits. The Program/Erase Controller automatically sets bits DQ2, DQ3,
DQ5, DQ6 and DQ7. Other bits (DQ0, DQ1 and DQ4) are reserved for future use and should
be masked (see
Table 5: Status Register Bits
).
5.1
Data Polling Bit (DQ7)
The Data Polling Bit can be used to identify whether the Program/Erase Controller has
successfully completed its operation or if it has responded to an Erase Suspend. The Data
Polling Bit is output on DQ7 when the Status Register is read.
During Program operations the Data Polling Bit outputs the complement of the bit being
programmed to DQ7. After successful completion of the Program operation the memory returns
to Read mode and Bus Read operations from the address just programmed output DQ7, not its
complement.
During Erase operations the Data Polling Bit outputs ’0’, the complement of the erased state of
DQ7. After successful completion of the Erase operation the memory returns to Read Mode.
In Erase Suspend mode the Data Polling Bit will output a ’1’ during a Bus Read operation within
a block being erased. The Data Polling Bit will change from a ’0’ to a ’1’ when the Program/
Erase Controller has suspended the Erase operation.
Figure 6: Data Polling Flowchart
gives an example of how to use the Data Polling Bit. A Valid
Address is the address being programmed or an address within the block being erased.
5.2
Toggle Bit (DQ6)
The Toggle Bit can be used to identify whether the Program/Erase Controller has successfully
completed its operation or if it has responded to an Erase Suspend. The Toggle Bit is output on
DQ6 when the Status Register is read.
During Program and Erase operations the Toggle Bit changes from ’0’ to ’1’ to ’0’, etc., with
successive Bus Read operations at any address. After successful completion of the operation
the memory returns to Read mode.
During Erase Suspend mode the Toggle Bit will output when addressing a cell within a block
being erased. The Toggle Bit will stop toggling when the Program/Erase Controller has
suspended the Erase operation.
If any attempt is made to erase a protected block, the operation is aborted, no error is signalled
and DQ6 toggles for approximately 100μs. If any attempt is made to program a protected block
or a suspended block, the operation is aborted, no error is signalled and DQ6 toggles for
approximately 1μs.
Figure 7: Data Toggle Flowchart
gives an example of how to use the Data Toggle bit.
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相關代理商/技術參數 |
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|---|---|
| M29W008ET90N6F | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8 Mbit (1Mb x 8, Boot Block) 3V Supply Flash Memory |
| M29W008T | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8 Mbit 1Mb x8, Boot Block Low Voltage Single Supply Flash Memory |
| M29W008T-100N1TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8 Mbit 1Mb x8, Boot Block Low Voltage Single Supply Flash Memory |
| M29W008T-100N5TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8 Mbit 1Mb x8, Boot Block Low Voltage Single Supply Flash Memory |
| M29W008T-100N6TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8 Mbit 1Mb x8, Boot Block Low Voltage Single Supply Flash Memory |
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