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Re: [Discuss-gnuradio] Digital 1
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From: |
Matt Ettus |
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Subject: |
Re: [Discuss-gnuradio] Digital 1 |
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Date: |
Wed, 15 Nov 2006 20:47:52 -0800 |
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User-agent: |
Thunderbird 1.5.0.7 (X11/20060922) |
Oussama Sekkat wrote:
> Hi,
> Quick question: I am using the daughterboards DEBUG IO pins , and I am
> connecting them to my logic analyzer. I have to enter the threshold
> value in my logic analyzer. I can choose between TTL (1.4V) CMOS
> (2.5V) ECL (- 1.3V). I am not sure which one to choose. Right now I
> have it set to a user value of 3.30V, is that the right choice?
All the signals are LVCMOS, 0 to 3.3V. The correct threshold is 1.65V
(3.3V/2)
Matt