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I’ll just have to see if I can work around this in software. Forum Update – Announcement about May 10th, update and your password. The CM and the Stamp are on the same power anyway. Mt8880 datasheet In mt8880 datasheet Register to comment. An earphone to the TONE input??

MT Datasheet, PDF – Alldatasheet

My problem is that this code as it is seems to mt8880 datasheet, but I can change or even remove the initialization lines and it still works Regardless of what code I use, with or without the “correct” initialization, mt8880 datasheet I get no tone and sometimes just row or colum tones.

I found that I had forgotten to set the Register select pin low after my initialization – so the Chip thought all the data I was sending was going to the control registers. No Developement Board – I’m making my own personal controller board Rafael. The above code was overly complicated as usual in addition to not working Thanks for looking anyway Rafael.

The earphone I mentioned ia mt8880 datasheet in paralled to the sound source, a DTMF software on my computer, so I can hear the sounds going into the chip.

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ESt is, as far as I know, to confirm tone reception only. Something that’s ours and ours alone. Comments 18 Comments sorted by Date Added Votes. Jeez, this is the third time I’m trying mt8880 datasheet post mt8880 datasheet Do you have the ability to sketch your layout? Whenever I connect ESt to anything, datsheet chip stops responding completely. I’ve been trying to figure it out for a few days, but I can’t ddatasheet it. It can’t be more than a LED, can it?

Back to the MT8880 DTMF Chip…initialization nightmares

Something that can’t be learned Whoops, I do have one more question. As soon as I remove the resistor and put the Stamp back in place, the voltage is 0.

The Chip now listens mt8880 datasheet me. I think I got my bits straight.

MT Datasheet pdf – ISO2-CMOS Integrated DTMFTransceiver – Mitel Semiconductor

Something we was born with. When I mt8880 datasheet the Stamp back in place, the voltage drops to 0. Oh – I tried to keep pin 5 low all the time In mt88880 words, the resistor does not solve the ESt problem.

I want to use the ESt pin for tone detection. Are you connecting the grounds together?

Post Edited PJ Allen: Yes I am, but I don’t see how that adtasheet make a difference How much current does it take to drive a Stamp pin high? ESt IS getting raised, but it mt8880 datasheet seem to drive a Stamp pin. Could the Stamp pin be sinking more current than the Chip can supply? So, I finished the hardware side of my circuit, but I have software problems. Flyingfishfinger – What development board mt88880 mt8880 datasheet using for the BS-2 application?

I just realized that the ESt pin can mt8880 datasheet source But I also noticed something else weird: It doesn’t get that cold.

You can’t break even, except on a very cold day. Sorry for being unclear.