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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/2218 Scheda tecnica(PDF) 605 Page - Renesas Technology Corp |
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H8S/2218 Scheda tecnica(HTML) 605 Page - Renesas Technology Corp |
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605 / 750 page  Section 17 Flash Memory (F-ZTAT Version) Rev.6.00 Jun. 03, 2008 Page 557 of 698 REJ09B0074-0600 Flash memory This LSI RAM Host Programming/ erase control program Boot program New application program Flash memory This LSI RAM Host New application program Flash memory This LSI RAM Host Flash memory erase Boot program New application program Flash memory This LSI Program execution state RAM Host 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 SCI or USB SCI or USB SCI or USB SCI or USB Figure 17.4 User Program Mode (Sample) |
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