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H8SX/1663M Datasheet(PDF) 1225 Page - Renesas Technology Corp |
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H8SX/1663M Datasheet(HTML) 1225 Page - Renesas Technology Corp |
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1225 / 1504 page  Section 25 Flash Memory Rev. 2.00 Sep. 24, 2008 Page 1193 of 1468 REJ09B0412-0200 • Erasure Erasure is executed by the erasure selection and block erasure commands. Firstly, erasure is selected by the erasure selection command and the boot program then erases the specified block. The command should be repeatedly executed if two or more blocks are to be erased. Sending a block erasure command from the host with the block number H'FF will stop the erasure operating. On completion of erasing, the boot program will wait for selection of programming or erasing. The sequence for the erasure selection and block erasure commands is shown in figure 25.28. Transfer of erasure program Host Boot program Preparation for erasure (H'48) ACK Erasure Erasure (Erasure block number) Erasure (H'FF) ACK ACK Repeat Figure 25.28 Erasure Sequence |
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