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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PSD4235G2 데이터시트(PDF) 25 Page - STMicroelectronics |
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PSD4235G2 데이터시트(HTML) 25 Page - STMicroelectronics |
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25 / 93 page  PSD4000 Series Preliminary Information 22 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 word that was written to Flash with the word that was intended to be written. When using the Data Toggle method after an erase instructin, Figure 4 still applies. DQ6 (DQ14) will toggle until the erase operation is complete. A ‘1’ on DQ5 (DQ13) will indicate a timeout failure of the erase operation, a ‘0’ indicates no error. The MCU can read any even location within the sector being erased to get DQ6 (DQ14) and DQ5 (DQ13) . PSDsoft generates ANSI C code functions which implement these Data Toggling algorithms. The PSD4000 Functional Blocks (cont.) Figure 4. Data Toggle Flow Chart START READ DQ5 & DQ6 (DQ13 & DQ14) at VALID EVEN ADDRESS NO YES NO YES YES NO DQ6 (DQ14) = TOGGLE DQ5 (DQ13) =1 READ DQ6 (DQ14) FAIL Program/Erase Operation Failed Issue Reset Instruction PASS Program/Erase Operation is Completed DQ6 (DQ14) = TOGGLE |
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