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From: "Richard Webb"
Subject: Re: working with 8255 and 12bit ADC
Date: Wed, 2 Oct 2002 16:49:38 +0100
NNTP-Posting-Date: 2 Oct 2002 15:48:30 GMT
X-Newsreader: Microsoft Outlook Express 5.00.2919.6700
Go get the datasheet and find out for yourself! You can get the full
datasheet at www.intersil.com (search for 82C55). But if memory serves
correctly you could use mode 0, with one 8-bit port set to all inputs and
then four bits of another port set to inputs (port C might be handy!). Then
to tell the 8255 this you must write a word to the control register, and
then write the appropriate direction words to the direction registers of the
ports you are using - and then voila. Having said all this unless you give
more details we have *no* way to tell how you've hooked up your ADC to your
"timtt" wrote in message
> can anyone suggest the flow of operation that i should program??
> what mode should i use for the 8255??
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