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Binary inputs - Principles of Modern Digital Design

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shabbs

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Binary inputs 1,0,X,Z

Hai there !
In real world of digital system Its either 1 or 0 volts(0-1volts) for 0 and ( 2-3volts) for on.How could a digital system have x,z.X is unknow state but a sytem should have finite value. I mean if one doest knows the value then how could he predict the systems output.Also Z high Impedence is also pinching me ! what would be the value of it.
 

Re: Binary inputs 1,0,X,Z

Hi,

Z means High impedance state, i.e

1)If you consider 5V devices,

logic 0 means from 0V to 1.6V
logic 1 means from 2.7V to 5.5V
In between the voltage range >1.6V and <2.7V is Z


2)If you consider 3.3V devices,

logic 0 means from 0V to 1.2V
logic 1 means from 1.7V to 3.6V
In between the voltage range >1.2V and <1.7V is Z

If you need more details, contact me.

Regards,

N.Muralidhara
CRL-BEL
 

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    shabbs

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Binary inputs 1,0,X,Z

An "X" usually means you don't care what the value is and "Z" (high impedance) means other drivers on the net controls the value while a specific driver is in tri-state (high Z).
 

Re: Binary inputs 1,0,X,Z

Hi,
It is not so easy to understand but needs some more reading, like the attachement.
Anyway, it is not so difficult, too.
 

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