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SPI bus length

 
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unitrant



Joined: 18 Jul 2005
Posts: 9
Location: Hertfordshire. UK

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SPI bus length
PostPosted: Fri Aug 12, 2005 7:22 am     Reply with quote
Does anyone have practical experience of running an SPI bus over a relatively long length i.e. a foot or two+?
dima2882



Joined: 13 Jul 2005
Posts: 25
Location: Maryland

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PostPosted: Fri Aug 12, 2005 8:54 am     Reply with quote
I am using it over a two-foot distance in an appliation right now. There are about half a dozen slaves connected to the bus over that distance. The clock freq is 4MHz. The bus is working properly.
Neutone



Joined: 08 Sep 2003
Posts: 839
Location: Houston

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PostPosted: Fri Aug 12, 2005 8:55 am     Reply with quote
It works fine. Put termination (Pullup or Pulldown) resistors at the end not driving the line.
unitrant



Joined: 18 Jul 2005
Posts: 9
Location: Hertfordshire. UK

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PostPosted: Fri Aug 12, 2005 8:59 am     Reply with quote
Many thanks for the answers.
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