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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PCI2040 데이터시트(PDF) 51 Page - Texas Instruments |
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PCI2040 데이터시트(HTML) 51 Page - Texas Instruments |
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51 / 79 page  4–19 4.32 HPI CSR I/O Base Address Register The PCI2040 supports the index/data scheme of accessing the HPI CSR registers. An address written to this register is the address for the index register and the address + 1 is the data address. The base address can be mapped anywhere in 32-bit I/O space on a word boundary except at address 0x0000; hence, bit 0 is read-only, returning 0 when read. The HPI CSR I/O base address is only meaningful when a nonzero value is written into this register. Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 Name HPI CSR I/O base address Type RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW Default 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Name HPI CSR I/O base address Type RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW R Default 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Register: HPI CSR I/O base address Type: Read-only, Read/Write Offset: 58h Default: 0000 0000h Table 4–17. HPI CSR I/O Base Address Register BIT FIELD NAME TYPE DESCRIPTION 31–1 HPICSR_IO_BAR RW Available address bits. These bits can be written by the host in order to allow initialization of the base address at startup. 0 RSVD R Reserved. Bit 0 returns 0 when read for word alignment. 4.33 HS Capability ID Register The HS capability ID register identifies the linked list item as the register for CompactPCI hot swap. This register returns 06h when read which is the unique ID assigned by the PCI SIG for the PCI location of the capabilities pointer and the value. Bit 7 6 5 4 3 2 1 0 Name HS capability ID Type R R R R R R R R Default 0 0 0 0 0 1 1 0 Register: HS capability ID Type: Read-only Offset: 5Ch Default: 06h |
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