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Author Topic: HP3478a display interface?  (Read 2073 times)

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Offline cellularmitosisTopic starter

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HP3478a display interface?
« on: January 31, 2014, 10:55:34 pm »
Hey all,

Does anyone know what interface the HP3478a uses to talk to its display?  Looking at the schematic, it looks like only a few lines connect to the microcontroller, so I'd assume it's a serial protocol?

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Offline cellularmitosisTopic starter

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Re: HP3478a display interface?
« Reply #1 on: January 31, 2014, 10:59:10 pm »
ah, this thread looks useful as a reference: https://www.eevblog.com/forum/projects/ressurecting-hp3478a/
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Offline grumpydoc

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Re: HP3478a display interface?
« Reply #2 on: January 31, 2014, 11:47:16 pm »
Quote
ah, this thread looks useful as a reference: https://www.eevblog.com/forum/projects/ressurecting-hp3478a/
Only a little - I never got around to trying to decode what was happening, partly because I found a replacement display (still haven't fixed that 3478A though)
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