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Here is mt8880 datasheet NV Column 7: It may be a dumb error on my part, or it’s the lack of understanding mt8880 datasheet the Stamp’s IO variables or the chip’s set-up routine. Post Edited PJ Allen: I’m still in a bit of a spot, because I can’t poll for this.

MT8880 Datasheet PDF

I’ll just have to see if I can work mt8880 datasheet this in software. The earphone I mentioned ia attached in paralled to the sound source, a DTMF software on my datashee, so I can hear the sounds going into the chip. Mt8880 datasheet think I got my bits straight. Something we was born with.

Could the Stamp pin be sinking more current than the Chip can supply? Sorry for being unclear. Catasheet problem is that this code mt8880 datasheet it is seems to work, 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, sometimes I get no tone and sometimes just row or colum tones.

Do you have the ability to sketch your layout? Flyingfishfinger – What development board are you mt8880 datasheet for the BS-2 application? But I also noticed something else weird: Whenever I connect ESt to anything, the chip stops responding completely. Something that can’t be learned An earphone to the TONE mt8880 datasheet Whoops, I do have one more question.

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I just realized that the Mh8880 pin can only source As soon as I remove the resistor and put the Stamp back in place, the voltage is 0. Sign In or Register to comment. It doesn’t get that cold. No Developement Board – I’m making my own personal controller mt8880 datasheet Rafael. Jeez, this is the third time I’m trying to post this ESt is, as far as I know, to confirm tone mt8880 datasheet only. When I attach it to the Stamp pin, all it ever sees is a 0.

How mt8880 datasheet current does it take to drive a Stamp pin high? Something that’s ours and ours alone. I have to take the number variable apart and write its bits to the pins.

mt8880 datasheet I found that I had datasjeet to set the Register select pin low after my initialization – so mt8880 datasheet Chip thought all the data I was sending was going to the control registers. ESt IS getting raised, but it can’t seem to drive a Stamp pin. The above code was overly complicated as usual in addition to not working Thanks for looking anyway Rafael.

HELP DTMF interface with PIC with ISDP

I’ve mt8880 datasheet trying to figure it out for a few days, but I can’t get it. The CM and the Mt8880 datasheet are on the same power anyway. ESt — is it to confirm a tone generation or a tone reception, or both, depending?

Mt8880 datasheet I am, but Dtaasheet don’t see how that should make a difference Ok, did that with a 10K without the Stamp on the board. The way it works now, I have to address the chip specifically and ask it if there’s a tone, but with ESt I could have polled for a high and then started up the decoding program. It can’t be more than datasheet Mt8880 datasheet, can it? Are you connecting the grounds together?