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DM9102AT Datasheet(PDF) 20 Page - List of Unclassifed Manufacturers |
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DM9102AT Datasheet(HTML) 20 Page - List of Unclassifed Manufacturers |
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20 / 77 page  DM9102A Single Chip Fast Ethernet NIC controller 20 Final Version: DM9102A-DS-F03 August 28, 2000 CardBus CIS Pointer (xxxxxx28 - CCIS) This Card Information Structure (CIS), also known as tuples, is a set of data structures saved in a nonvolatile memory on the CardBus Card. The data stored in CIS describes the product. Included in this data are the product manufacturer’s name, product name, and most importantly, the hardware description. The CIS is supported in the boot ROM space or the memory space (serial ROM). CIS is read upon card insertion into the socket. The software entity that traditionally reads the CIS is usually known as Card Services and Socket Services (CS & SS). The CCIS pointer register is a read-only 32-bit register. This register points to one of the possible address space where the card information structure (CIS) begins. The pointer is used in a CardBus environment. The content of CCIS is loaded from the serial ROM after a hardware reset. A value of 0 in this register indicates that CIS is not supported. 31 0 3 27 28 ROM Image Address Space Offset Address Space Indicator 2 Bit Default Type Description 31:28 Note R/W ROM Image The 4-bit ROM image field value when the CIS reside in an expansion ROM. 27:3 Note R/W Address Space Offset This field contains the address offset within the address space indicated by the address space indicator field (CCIS<2:0>) 2:0 Note R/W Address Space Indicator This field indicates the location of the CIS base address. The value of 2 indicates that the CIS is stored in the serial ROM, and 7, indicates that the CIS is stored in the expansion ROM. note : read from serial ROM |
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