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4139 Views 4 Replies Latest reply: Mar 17, 2010 10:18 PM by Yiying RSS
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Mar 5, 2010 1:29 AM

Will 8-bit MCU be phased out ?

Hi All,

 

I was reading an article in EDN and happen to come across this article. Thus, I was thinking will 8 bit MCUs be phased out since $ per MCU between 8 bit and 32 bits are almost the same.

 

http://www.edn.com/article/CA6718479.html

 

But of cos, there are 2 side of the coins. Though both MCUs price are comparable, in terms of power, 8 bit MCU will consume less power. This boils down to application specific (Eg. Sleep current are more critical in some applications)

 

Any thoughts ? Feel free to correct me if I am somehow mistaken

 

Cheers

Edmund

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  • Currently Being Moderated
    1. Mar 5, 2010 3:43 AM (in response to edmund)
    Re: Will 8-bit MCU be phased out ?
    Will the 74 series be phased out?  There are programmable devices around that could reduce the dozens of little trays and drawers of 74's and 4000's many of us have hidden somewhere to just a few, based on pincount.

     

    Only when the people that design with them are phased out.  For most jobs the 8-bit mcu's running at low clock speeds are very capable.  While newer, faster, wider micro's might be the same price, they aren't the same cost.  Pincounts keep going up as more and more ports and peripherals are added which makes PCB design more difficult, voltages keep dropping which forces the use of different external peripherals, and the cost of development tools and people skilled in their use goes up.

     

    People trust 8-bit micro families that have been around for years.  The 8051's over 30 years old but new "compatible" devices are still being developed, and you'll find low pincount PICs all over the place because they can solve so many little design problems with such little effort and using such little PCB resourse.

     

    Maybe when colleges and universities stop using 8bit devices in labs, and hobby magazines stop publishing 8bit projects, perhaps then the manufacturers will stop developing newer 8 bit chips.

  • Currently Being Moderated
    2. Mar 14, 2010 10:40 PM (in response to edmund)
    Re: Will 8-bit MCU be phased out ?

    How about 16-bits? Is 16 bits the same as 32 bits?

    May i know their difference?

  • Currently Being Moderated
    4. Mar 17, 2010 10:18 PM (in response to edmund)
    Re: Will 8-bit MCU be phased out ?
    I don't think 8-bit MCUs will be dead, even if the price of 32-bit MCUs are as low as that of 8-bit MCUs. In the competitive market, accelerating time-to-market remains a key objective for the companise. The obtalces facing the designers for migrating 8-bit MCUs to 32-bit are bovious. Currently there is less of compatibile devices between 8-bit and 32-bit. The designers have to spend time in re-designing schematics, familar with new development platform, instruction set, tools, and so on. These will cause to slow down time to market for new products. There are too many existing products designed with 8-bit MCUs to be replaced by 32-bit so far. MCU manufacturers also save the 8-bit market, as they constantly release new high performance 8-bit MCUs which are suitable for low-end applications.

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