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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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H8/3028F 数据表(PDF) 616 Page - Renesas Technology Corp |
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H8/3028F 数据表(HTML) 616 Page - Renesas Technology Corp |
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616 / 923 page  Rev. 2.00, 09/03, page 586 of 890 18.4.2 On-Board Programming Modes Example of Boot Mode Operation Flash memory H8/3028F-ZTAT RAM Host Programming control program SCI Application program (old version) New application program Flash memory H8/3028F-ZTAT RAM Host SCI Application program (old version) Boot program area New application program Flash memory H8/3028F-ZTAT RAM Host SCI Flash memory prewrite-erase Boot program New application program Flash memory H8/3028F-ZTAT Program execution state RAM Host SCI New application program Boot program Programming control program Boot program area 1. Initial state The old program version or data remains written in the flash memory. The user should prepare the programming control program and new application program beforehand in the host. 2. Programming control program transfer When boot mode is entered, the boot program in the H8/3028F-ZTAT (originally incorporated in the chip) is started and the programming control program in the host is transferred to RAM via SCI communication. The boot program required for flash memory erasing is automatically transferred to the RAM boot program area. 3. Flash memory initialization The erase program in the boot program area (in RAM) is executed, and the flash memory is initialized (to H'FF). In boot mode, total flash memory erasure is performed, without regard to blocks. 4. Writing new application program The programming control program transferred from the host to RAM is executed, and the new application program in the host is written into the flash memory. Boot program Boot program Programming control program Boot program area Programming control program |
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