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ST10F273Z4 Datasheet(PDF) 41 Page - STMicroelectronics |
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ST10F273Z4 Datasheet(HTML) 41 Page - STMicroelectronics |
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41 / 188 page  ST10F273Z4 Internal Flash memory 41/188 Then the operation can be resumed in the following way: FCR0H |= 0x0800; /*Set SER in FCR0H*/ FCR0H |= 0x8000; /*Operation resume*/ Before resuming a suspended Erase, FCR1H/FCR1L must be read to check if the Erase is already completed (FCR1H = FCR1L = 0x0000 if Erase is complete). Original setup of Select Operation bits in FCR0H/L must be restored before the operation resume, otherwise the operation is aborted and bit RESER of FER is set. Erase suspend, program and resume A Sector Erase operation can be suspended in order to program (Word or Double Word) another sector. Example: Sector Erase of sector B0F1. FCR0H |= 0x0880; /*Set SER in FCR0H, SMOD must be set*/ FCR1L |= 0x0002; /*Set B0F1*/ FCR0H |= 0x8000; /*Operation start*/ Example: Sector Erase Suspend. FCR0H |= 0x4000; /*Set SUSP in FCR0H*/ do /*Loop to wait for LOCK=0 and WMS=0*/ {tmp1 = FCR0L; tmp2 = FCR0H; } while ((tmp1 && 0x0010) || (tmp2 && 0x8000)); Example: Word Program of data 0x5555AAAA at address 0x045554. FCR0H &= 0xBFFF; /*Rst SUSP in FCR0H*/ FCR0H|= 0x2080;/*Set WPG in FCR0H, SMOD must be set*/ FARL = 0x5554; /*Load Add in FARL*/ FARH = 0x0004; /*Load Add in FARH*/ FDR0L = 0xAAAA; /*Load Data in FDR0L*/ FDR0H = 0x5555; /*Load Data in FDR0H*/ FCR0H |= 0x8000; /*Operation start*/ Once the Program operation is finished, the Erase operation can be resumed in the following way: FCR0H|= 0x0800;/*Set SER in FCR0H*/ FCR0H|= 0x8000;/*Operation resume*/ Notice that during the Program Operation in Erase suspend, bits SER and SUSP are low. A Word or Double Word Program during Erase Suspend cannot be suspended. In summary: A Sector Erase can be suspended by setting SUSP bit. ● To perform a Word Program operation during Erase Suspend, firstly bits SUSP and SER must be reset, then bit WPG and WMS can be set. ● To resume the Sector Erase operation bit SER must be set again. ● In any case it is forbidden to start any write operation with SUSP bit already set. |
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