Newsgroups: comp.robotics
Path: brunix!uunet!zaphod.mps.ohio-state.edu!howland.reston.ans.net!bogus.sura.net!udel!rochester!galileo.cc.rochester.edu!news
From: jeff@cvs.rochester.edu (Jeff Pelz)
Subject: Miniboard: Terminating pin AS & motor controller question
Message-ID: <1993Mar30.052455.8846@galileo.cc.rochester.edu>
Keywords: miniboard 
Sender: news@galileo.cc.rochester.edu
Nntp-Posting-Host: merlin.cvs.rochester.edu
Organization: Center for Visual Science, U. of Rochester
Date: Tue, 30 Mar 93 05:24:55 GMT
Lines: 23


Two questions from a newcomer to the miniboard, HC11's, and c.r:

1) After reading Fred Martin's docs, and spending some time inside Motorola's
   pink book, I'm confused about the need to terminate the AS pin.  Motorola 
   warns against leaving AS unterminated in single-chip mode, because it may 
   oscillate, drawing substantial current and creating noise on VDD if it's 
   left floating.

   But the pin isn't terminated on the miniboard ... should it be?

2) Is the 600 mA limit on the mb's motor drivers .6A per motor, per chip, or
   per mb?  In short, if I only need to drive two motors, can I piggy-back 
   the existing outputs to get more current to the two motors without having 
   to physically piggy-back the chips as on the 6.270 board?


Thanks for any help/clarification!


Jeff Pelz			Center for Visual Science
jeff@cvs.rochester.edu		 University of Rochester

