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Old 11-26-2004, 09:32 AM   #1
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Default Why Serial?

There has been a new article posted.

Title: Why Serial?
URL: http://www.hardwaresecrets.com/article/47

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If you pay attention to it, all technologies that exist today are migrating from parallel communication to serial communication. The new IDE standard for hard disks is serial ...

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Old 06-12-2013, 01:28 AM   #2
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Hi, interesting article with good points. I have a couple questions.

You mention protecting the wires in the 5th paragraph. Do motherboard manufactures ever shield their traces/wires for EMI if using parallel circuits or are suggesting isolating the wires apart from each other as means of protection?

Also I'm kind of confused. Maybe I am misunderstanding and so I apologize.

Why would the motherboard require 4 wires for a serial transmission? Two for transmission and two for receiving data? Couldn't two wires be sufficient for full duplex one for sending and one for receiving?
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Old 06-12-2013, 02:21 PM   #3
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Hi,

Four wires are required because they use differential transmission: http://en.wikipedia.org/wiki/Differential_signaling.

As for protecting the wires/routings on the motherboard, motherboards use multiple layers, such as 4 or 6, and not only the two you see. They use grounding layers for helping with EMI. There some good pictures showing this here: http://en.wikipedia.org/wiki/Via_(electronics)

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Old 06-14-2013, 02:49 AM   #4
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Thank you for the links.
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