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PSD913F2 bảng dữ liệu(PDF) 27 Page - STMicroelectronics

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Giải thích chi tiết về linh kiện  Flash In-System Programmable ISP Peripherals For 8-bit MCUs
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PSD913F2 bảng dữ liệu(HTML) 27 Page - STMicroelectronics

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Preliminary Information
PSD9XX Family
23
9.1.1.6.2 Data Toggle (cont.)
It is suggested (as with all Flash memories) to read the location again after the embedded
programming algorithm has completed to compare the byte that was written to Flash with
the byte that was intended to be written.
When using the Data Toggle method after an erase instructin, Figure 4 still applies. DQ6
will toggle until the erase operation is complete. A ‘1’ on DQ5 will indicate a timeout failure
of the erase operation, a ‘0’ indicates no error. The MCU can read any location within the
sector being erased to get DQ6 and DQ5.
PSDsoft will generate ANSI C code functions which implement these Data Toggling
algorithms.
The
PSD9XX
Functional
Blocks
(cont.)
Figure 4. Data Toggle Flow Chart
START
READ
DQ5 & DQ6
NO
YES
NO
YES
YES
NO
DQ6
=
TOGGLE
DQ5
=1
DQ6
=
TOGGLE
READ DQ6
FAIL
Program/Erase
Operation Not
Complete, Issue
Reset Instruction
PASS
Program/Erase
Operation is
Complete



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