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AN2540 bảng dữ liệu(PDF) 22 Page - STMicroelectronics

tên linh kiện AN2540
Giải thích chi tiết về linh kiện  EEPROM emulation in STR91xFxx devices
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AN2540 bảng dữ liệu(HTML) 22 Page - STMicroelectronics

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Embedded application aspects
AN2540 - Application note
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4.4.2
Program timing
The following table gives an idea about the emulated EEPROM write time related to the
current implementation.
It is clear that updating a variable with the 1st method scheme takes less time than with the
2nd method scheme since only the corresponding allocated memory space is accessed in
the first case and not the whole sector.
Table 9.
Write time related to the current implementation
Implemented scheme
Parameter
Write time (typical)
Write time (max)(1)
1.
This is the time taken to update a variable that makes a call to the EepromSectorTransfer(..) function. It is
nearly equal to the sector erase time.
1st method scheme
20 µs
300 ms
2nd method scheme
30 µs
300 ms



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