APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY Previous Years Question Paper & Answer

Course : B.Tech

Semester : SEMESTER 6

Subject : Embedded System

Year : 2018

Term : MARCH

Scheme : 2015 Full Time

Course Code : EC 308

Page:26





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Compact PCI (दला)

Each PCI device on Bus

_ Perform a specific function,

_ May contain a processor and software to perform a specific function.

_ Each device has the specific memory address-range, specific interrupt-vectors(preassigned

or auto configured) and the device I/O port addresses.

_ A bus of appropriate specifications and protocol interfaces these to the host computer

system orcomputer

Configuration address space

_ unique feature of PCI bus unique feature is its configuration address space.

PCI controller Features

* Accesses one device at ೩ time

٠ All the devices within host device or system can share the I/O port and memory addresses,
but cannot share the configuration registers

* Device cannot modify other configuration registers but can access other device resources
or share the work or assist the other device

* If there are reasons for doing it so, a PCI driver can change the default boot up assignments
on configuration transactions. PCI Device Initialization

A device can initialize at booting time *

Avoids any address collision

* Device on boot up disables its interrupt and closes its door to its addr ess space except to

Performs the ९0 nfiguration transactions and then, memory an d address spaces
automatically map to the address space in the device hosting system.

PART 8
the configuration registers space

PCI BIOS (Basic Input-Output System)

5.b)PROGRAMMING IN ASSEMBLY AND HLL

* Processor and memory-sensitive instructions: Program codes maybe written in assembly

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