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参数资料
| 型号： | M29W800FB9N3F |
| 厂商： | NUMONYX |
| 元件分类： | PROM |
| 英文描述： | 512K X 16 FLASH 3V PROM, 90 ns, PDSO48 |
| 封装： | 12 X 20 MM, ROHS COMPLIANT, PLASTIC, TSOP-48 |
| 文件页数： | 15/49页 |
| 文件大小： | 936K |
| 代理商： | M29W800FB9N3F |
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Status register
M29W800FT, M29W800FB
5
Status register
Bus read operations from any address always read the status register during program and
erase operations. It is also read during erase suspend when an address within a block being
erased is accessed.
The bits in the status register are summarized in Table 7: 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 5: 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 100 s. 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 1 s.
Figure 6: Toggle flowchart gives an example of how to use the toggle bit.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M29W800FT70D11 | 制造商:Micron Technology Inc 功能描述:PARALLEL NOR - Gel-pak, waffle pack, wafer, diced wafer on film |
| M29W800FT70N3E | 制造商:Micron Technology Inc 功能描述:IC FLASH 8MBIT 70NS 48TSOP |
| M29W800FT70N3F | 制造商:Micron Technology Inc 功能描述:AUTOMOTIVE - Tape and Reel |
| M29W800FT70N3F TR | 制造商:Micron Technology Inc 功能描述:IC FLASH 8MBIT 70NS 48TSOP |
| M29W800FT70ZA3SE | 制造商:Micron Technology Inc 功能描述:AUTOMOTIVE - Trays 制造商:Micron Technology Inc 功能描述:IC FLASH 8MBIT 70NS 48TFBGA |
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