PM7367 datasheet(273/323 Pages) PMC

номер детали	PM7367

подробное описание детали	FRAME ENGINE AND DATA LINK MANAGER

PDF	323 Pages

Scroll/Zoom	100%

производитель	PMC [PMC-Sierra, Inc]

домашняя страница	http://www.pmc-sierra.com

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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.

PM7367 датащи(PDF) 273 Page - PMC-Sierra, Inc