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数据搜索系统，热门电子元器件搜索 |
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SLAS191A 数据表(PDF) 78 Page - Texas Instruments |
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SLAS191A 数据表(HTML) 78 Page - Texas Instruments |
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78 / 86 page  6–2 Reset Set Location of Identification Address Pointer to E9DEh Decrement Identification Address Pointer By 22h Identification ? Contents of Identification Address = 0000h Identification ? Contents of Identification Address = AA55h Copy EPROM Interrupt Vectors And Identification AA55h To RAM Interrupt Vectors Jump To New Reset Vector Address In RAM Emergency Return To Monitor ? (Optional – User Defined yes: BR Ret_Mon) Start Monitor no yes yes Figure 6–1. Identifying AA55h After Reset NOTE: It is important that the emergency return to the Monitor routine works properly and has been tested in RAM before burning it into the EPROM. If the actual identification address contains address AA55h, the Monitor will NEVER start again. Be sure to program the key as the last step in the evaluation of a program, after all errors have been fixed. |
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