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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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AM79C976 数据表(PDF) 46 Page - Advanced Micro Devices |
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AM79C976 数据表(HTML) 46 Page - Advanced Micro Devices |
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46 / 309 page  46 Am79C976 8/01/00 P R E L I M INARY )LJXUH'LVFRQQHFW :LWK'DWD 7UDQVIHU 'LVFRQQHFW:LWKRXW'DWD 7UDQVIHU Figure 16 shows a target disconnect sequence during which no data is transferred. STOP is asserted on clock 4 without TRDY being asserted at the same time. The Am79C976 controller terminates the access with the deassertion of FRAME on clock 5 and of IRDY one clock cycle later. It finally releases the bus on clock 7. The Am79C976 controller will again request the bus after two clock cycles to retry the last transfer. The starting address of the new transfer will be the address of the last non-transferred data. FRAME CLK AD IRDY TRDY C/BE DEVSEL REQ GNT PAR DEVSEL is sampled ADDRi 0000 0111 PAR 0111 2 3456789 11 10 PAR DATA STOP ADDRi+8 DATA 1 22929B17 |
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