11-Input-Output - I

11-Input-Output - I - Input / Output - I Presenter...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Input / Output - I Presenter Tathagata Bhattacharjee
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Tathagata Bhattacharjee 2 Input/Output Problems Wide variety of peripherals Delivering different amounts of data At different speeds In different formats All slower than CPU and RAM Need I/O modules with some “intelligence”
Background image of page 2
Tathagata Bhattacharjee 3 Input/Output Module Interface to CPU and Memory Interface to one or more peripherals
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Tathagata Bhattacharjee 4 Generic Model of I/O Module
Background image of page 4
Tathagata Bhattacharjee 5 Major functions of I/O modules Interface to the processor and memory via the system bus (Address lines, Data lines and control lines) Interface to one or more peripheral devices by tailored data links
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Tathagata Bhattacharjee 6 External Devices Human readable (human interface) Monitor, printer, keyboard, mouse Machine readable Disk, tape, sensors Communication Modem Network Interface Card (NIC)
Background image of page 6
Tathagata Bhattacharjee 7 External Device Block Diagram
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Tathagata Bhattacharjee 8 Control signals determine the function that the device will perform such as send data to I/O module (INPUT or READ) or accept data from I/O module (OUTPUT or WRITE) The status of the I/O module is reported back e.g position of a disk head Data are in form of a set of bits to be sent to or receive from the I/O module
Background image of page 8
Tathagata Bhattacharjee 9 Status signal indicates the state of the device e.g., READY / NOT- READY to show whether the device is ready for data transfer Control logic associated with the device controls the device’s operation in response to direction from the I/O module
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 28

11-Input-Output - I - Input / Output - I Presenter...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online