参数资料
型号: M29F016D90M6F
厂商: STMICROELECTRONICS
元件分类: PROM
英文描述: 2M X 8 FLASH 5V PROM, 90 ns, PDSO44
封装: 0.525 INCH, LEAD FREE, PLASTIC, SOP-44
文件页数: 6/37页
文件大小: 707K
代理商: M29F016D90M6F
Obsolete
Product(s)
- Obsolete
Product(s)
14/37
Alternative Toggle Bit (DQ2). The
Alternative
Toggle Bit can be used to monitor the Program/
Erase controller during Erase operations. The Al-
ternative Toggle Bit is output on DQ2 when the
Status Register is read.
During Chip Erase and Block Erase operations the
Toggle Bit changes from ’0’ to ’1’ to ’0’, etc., with
successive Bus Read operations from addresses
within the blocks being erased. A protected block
is treated the same as a block not being erased.
Once the operation completes the memory returns
to Read mode.
During Erase Suspend the Alternative Toggle Bit
changes from ’0’ to ’1’ to ’0’, etc. with successive
Bus Read operations from addresses within the
blocks being erased. Bus Read operations to ad-
dresses within blocks not being erased will output
the memory cell data as if in Read mode.
After an Erase operation that causes the Error Bit
to be set the Alternative Toggle Bit can be used to
identify which block or blocks have caused the er-
ror. The Alternative Toggle Bit changes from ’0’ to
’1’ to ’0’, etc. with successive Bus Read Opera-
tions from addresses within blocks that have not
erased correctly. The Alternative Toggle Bit does
not change if the addressed block has erased cor-
rectly.
Table 5. Status Register Bits
Note: Unspecified data bits should be ignored.
Operation
Address
DQ7
DQ6
DQ5
DQ3
DQ2
RB
Program
Any Address
DQ7
Toggle
0
0
Program During Erase
Suspend
Any Address
DQ7
Toggle
0
0
Program Error
Any Address
DQ7
Toggle
1
0
Chip Erase
Any Address
0
Toggle
0
1
Toggle
0
Block Erase before
timeout
Erasing Block
0
Toggle
0
Toggle
0
Non-Erasing Block
0
Toggle
0
No Toggle
0
Block Erase
Erasing Block
0
Toggle
0
1
Toggle
0
Non-Erasing Block
0
Toggle
0
1
No Toggle
0
Erase Suspend
Erasing Block
1
No Toggle
0
Toggle
1
Non-Erasing Block
Data read as normal
1
Erase Error
Good Block Address
0
Toggle
1
No Toggle
0
Faulty Block Address
0
Toggle
1
Toggle
0
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