M29F512B 查看數據表（PDF） - STMicroelectronics
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M29F512B Datasheet PDF : 16 Pages
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Table 6. Status Register Bits
Operation
Program
Program Error
Chip Erase
Erase Error
Note: Unspecified data bits should be ignored.
Figure 3. Data Polling Flowchart
M29F512B
Address
Any Address
Any Address
Any Address
Any Address
DQ7
DQ7
DQ7
0
0
DQ6
Toggle
Toggle
Toggle
Toggle
DQ5
0
1
0
1
Figure 4. Data Toggle Flowchart
START
READ DQ5 & DQ7
at VALID ADDRESS
DQ7
=
YES
DATA
NO
NO DQ5
=1
YES
READ DQ7
DQ7
=
YES
DATA
NO
FAIL
PASS
AI01369
START
READ
DQ5 & DQ6
DQ= 6
NO
TOGGLE
YES
NO DQ5
=1
YES
READ DQ6
DQ= 6
NO
TOGGLE
YES
FAIL
PASS
AI01370
Error Bit (DQ5). The Error Bit can be used to
identify errors detected by the Program/Erase
Controller. The Error Bit is set to ’1’ when a Pro-
gram or Chip Erase operation fails to write the cor-
rect data to the memory. If the Error Bit is set a
Read/Reset command must be issued before oth-
er commands are issued. The Error bit is output on
DQ5 when the Status Register is read.
Note that the Program command cannot change a
bit set at ’0’ back to ’1’ and attempting to do so will
cause an error. The Chip Erase command must be
used to set all the bits the memory from ’0’ to ’1’.
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