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| 82551QM Datasheet, PDF (61/120 Pages) Intel Corporation – Fast Ethernet Multifunction PCI/CardBus Controller | |||
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Networking Silicon â 82551QM
9.1.9.2
9.1.9.3
CSR I/O Mapped Base Address Register
The 82551QM requires one BAR for I/O mapping. Software determines which BAR, I/O or
memory, is used to access the 82551QM CSR registers. The I/O space for the 82551QM CSR I/O
BAR is 64 bytes.
Flash Memory Mapped Base Address Register
The Flash Memory BAR is a Dword register. The 82551QM physically supports a 128 KB Flash
device. In a CardBus system, the upper section of the memory mapped window (above the physical
Flash device) is used for CIS information. The 82551QM claims a window of 128 KB in CardBus
mode and always claims a Flash memory window, regardless of whether or not a Flash device is
connected.
Datasheet
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