Newsgroups: sci.electronics
Path: utzoo!henry
From: henry@utzoo.uucp (Henry Spencer)
Subject: Re: Need pointer to CMOS Uart
Message-ID: <1990Mar19.014241.5473@utzoo.uucp>
Organization: U of Toronto Zoology
References: <53558@microsoft.UUCP> <34002@prls.UUCP> <1990Mar16.055156.19874@utzoo.uucp> <445@wombat.UUCP>
Date: Mon, 19 Mar 90 01:42:41 GMT

In article <445@wombat.UUCP> george@wombat.UUCP (George Scolaro) writes:
>...The only
>problem with the part (not a bug as such) is that it lacks sufficient
>handshake signals...  Signetics gave the chip a bucket of general purpose
>inputs, but not enough general purpose outputs, so you need an external
>latch to take care of the dtr...

This is actually the right decision if you are short of pins.  Inputs
generally want things like edge detectors, to provide an interrupt when
something changes, and those are hard to do yourself.  Outputs just want
latches, which are off-the-shelf parts.
-- 
MSDOS, abbrev:  Maybe SomeDay |     Henry Spencer at U of Toronto Zoology
an Operating System.          | uunet!attcan!utzoo!henry henry@zoo.toronto.edu