Newsgroups: comp.robotics
Subject: Re: Info wanted: Motorola
From: robin.hunziker@mecheng.fullfeed.com (Robin Hunziker)
Path: brunix!cat.cis.Brown.EDU!agate!howland.reston.ans.net!vixen.cso.uiuc.edu!uwm.edu!daffy!uwvax!gorgon!fullfeed!mecheng!robin.hunziker
Distribution: world
Message-ID: <af.5235.33.0NAF7C31@mecheng.fullfeed.com>
References: <r12110.19.000D73D7@email.sps.mot.com>
Date: Fri, 13 May 94 08:58:00 -0600
Organization: MechEng / American Society of Mechanical Engineers
Lines: 32


R1Almost, here is a little more detail on the 68330,1,2:
  68330   CPU32
          SIM (one periodic interrupt timer, chip selects, etc.)
  68331   CPU32
          SIM (like 68330 SIM)
          GPT (like 68HC11E9 timers with 2 PWMs)
          QSM (serial port and Queued SPI)

Jeff, what exactly does "SIM" indicate?  Can I obtain more information
on QSM? (Are there any app notes or white papers?)  Can more than
two devices exist on one SPI or QSPI bus?  Does any sort of addressing
or content-based (like CAN) scheme exist or can the above only be
performed using separate chip-select lines?  (The app notes I've seen
only discuss communicating between the peripheral and micro.)

R1>The chips aren't particularly hacker-friendly, being in fine-pitch
  >surface mount packages, and usually require both external ROM and
  >RAM...

R1Several companies make sockets for the 132 & 160 QFP parts. The
  sockets have standard through hole pins. The 68332 can be used with
  just an external ROM. If you want single-chip operation, look at the
  68F333. It has CPU32, SIM, 4K SRAM, 64K FLASH, QSM, TPU, and an ADC.

Do you have any recommendations and/or part numbers regarding the
sockets?  (Whose would *you* use if you were prototyping at home?)  Is
the 68F333 really available?  We've had a tough time getting 68HC705s,
we've never even seen a 6808 - and not for want of trying.  For a much
more advanced item, we'ld like to play with 683xx but don't know whether
they're really available to those without automotive-type volumes.

