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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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M38041FEHKP 数据表(PDF) 102 Page - Renesas Technology Corp |
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M38041FEHKP 数据表(HTML) 102 Page - Renesas Technology Corp |
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102 / 387 page  1-84 REJ09B0212-0100Z Rev.1.00 Jan 14, 2005 3804 Group (Spec.H) HARDWARE FUNCTIONAL DESCRIPTION s Notes on CPU Rewrite Mode Take the notes described below when rewriting the flash memory in CPU rewrite mode. qOperation speed During CPU rewrite mode, set the system clock φ to 4.0 MHz or less using the clock division ratio selection bits (bits 6 and 7 of ad- dress 003B16). qInstructions inhibited against use The instructions which refer to the internal data of the flash memory cannot be used during CPU rewrite mode. qInterrupts The interrupts cannot be used during CPU rewrite mode because they refer to the internal data of the flash memory. qWatchdog timer If the watchdog timer has been already activated, internal reset due to an underflow will not occur because the watchdog timer is surely cleared during program or erase. qReset Reset is always valid. The MCU is activated using the boot mode at release of reset in the condition of CNVss = “H”, so that the pro- gram will begin at the address which is stored in addresses FFFC16 and FFFD16 of the boot ROM area. |
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