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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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H8S/2224 Scheda tecnica(PDF) 805 Page - Renesas Technology Corp |
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H8S/2224 Scheda tecnica(HTML) 805 Page - Renesas Technology Corp |
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805 / 1071 page  Section 20 Flash Memory (F-ZTAT Version) Rev. 5.00 Aug 08, 2006 page 719 of 982 REJ09B0054-0500 Flash memory This LSI RAM Host Programming/ erase control program SCI Boot program New application program Flash memory This LSI RAM Host SCI New application program Flash memory This LSI RAM Host SCI Flash memory erase Boot program New application program Flash memory This LSI Program execution state RAM Host SCI Boot program Boot program FWE assessment program Application program (old version) New application program 1. Initial state The FWE assessment program that confirms that user program mode has been entered, and the program that will transfer the programming/erase control program from flash memory to on-chip RAM should be written into the flash memory by the user beforehand. The programming/erase control program should be prepared in the host or in the flash memory. 2. Programming/erase control program transfer When user program mode is entered, user software confirms this fact, executes transfer program in the flash memory, and transfers the programming/erase control program to RAM. 3. Flash memory initialization The programming/erase program in RAM is executed, and the flash memory is initialized (to H'FF). Erasing can be performed in block units, but not in byte units. 4. Writing new application program Next, the new application program in the host is written into the erased flash memory blocks. Do not write to unerased blocks. Programming/ erase control program Programming/ erase control program Programming/ erase control program Transfer program Application program (old version) Transfer program FWE assessment program FWE assessment program Transfer program FWE assessment program Transfer program Figure 20.4 User Program Mode (Example) |
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