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DM9102AT 데이터시트(PDF) 20 Page - List of Unclassifed Manufacturers

부품명 DM9102AT
상세설명  Single Chip Fast Ethernet NIC controller
PDF  77 Pages
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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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