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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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PM7367 数据表(PDF) 273 Page - PMC-Sierra, Inc |
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PM7367 数据表(HTML) 273 Page - PMC-Sierra, Inc |
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273 / 323 page  PM7367 FREEDM-32P32 DATA SHEET PMC-1991499 ISSUE 2 FRAME ENGINE AND DATA LINK MANAGER PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMER’S INTERNAL USE 259 BSAD[27:0]: The Base Address (BSAD[27:0]) bits defines the size and location of the memory space required for the CBI registers. The BSAD[27:0] bits correspond to the most significant 28 bits of the PCI address space. The size of the address space required can be determined by writing all ones to Base Address register and then reading from it. By scanning the returned value from the least significant bit upwards, the size of the required address space can be determined. The binary weighted value of the first one bit found (after the configuration bits) indicates the required amount of space. The BSAD[7:0] bits are forced low to indicate that the CBI registers require 4K bytes of memory space. After determining the memory requirements of the CBI registers, the PCI Host can map them to its desired location by modifying the BSAD[27:8] bits in the Base Address register. |
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