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Eprom 27c256 D0-D7 data waveform
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Topic: Eprom 27c256 D0-D7 data waveform (Read 541 times)
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Daxxin
Regular Contributor
Posts: 213
Eprom 27c256 D0-D7 data waveform
«
on:
April 24, 2019, 08:14:42 am »
looking with scope at the data D0-7 i get this shape ..thats a valid data , garbage , freerunning , Z-state ?
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bson
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Re: Eprom 27c256 D0-D7 data waveform
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Reply #1 on:
April 24, 2019, 08:15:40 pm »
Check where you attached the probe's ground clip... this looks a lot like you don't have a good signal reference.
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T3sl4co1l
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Expert, Analog Electronics, PCB Layout, EMC
Re: Eprom 27c256 D0-D7 data waveform
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Reply #2 on:
April 24, 2019, 09:11:34 pm »
Also, make sure probe is on 10x setting, and scope is >= 20MHz.
Tim
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Ian.M
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Re: Eprom 27c256 D0-D7 data waveform
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Reply #3 on:
April 24, 2019, 10:30:47 pm »
... and that the x10 probe's compensation adjustment is set up correctly for the flattest possible tops/bottoms on the scope's test signal with no visible over/undershoot on the edges
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Eprom 27c256 D0-D7 data waveform
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