Comments on PE Micro's Cyclone Pro for 6808/6812?

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After several intsruments built with the 6805, I'm looking to upgrade
to a more modern processor with more code space and RAM, as well as
more modern debugging schemes. The 6808 series seems to fit the bill,
specifically the GP32 chip.

One of my biggest hangups about the 6805 is the ancient and poorly
supported debugging/emulator tools (I use the Cosmic compiler which I
DO like). After my emulator apparently died, I'm hesitant to put in
more money toward the 6805 tools.

The Cyclone Pro product from PE Micro looks like a very useful tool.

Is it reliable? Is the interface software stable and reliable for both
programming the flash and remote debugging through a MON08 port? How's
the support from PE Micro? Does the MON08 debugging capability provide
enough info to be useful during the first stages of product
development and bypass the need for an emulator?

Your input appreciated.

Also, a technical question: the datasheet for the 908GP32 seems to
indicate that it is not possible to use a 4 MHz crystal for the clock
such as is possible with the 705C9A. One must either use a 32.768 kHz
crystal and the PLL feature to synthesize the clock (and implement the
external filter), or use a CMOS level oscillator? Is this correct?

Michael McCulloch

Re: Comments on PE Micro's Cyclone Pro for 6808/6812?
Motorola, err Freescale Semiconductor has a CD-ROM tutorial that uses that
particular chip as a reference. The CD in question is CDV110CT (Rev1) -
"68HC08 8-bit FLASH Microcontroller" which can be ordered gratis via phone
at 1-800-441-2447 or via the net at

Gary Schnabl

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Re: Comments on PE Micro's Cyclone Pro for 6808/6812?

Although I have not used the CyclonePro, I have used used P&E's
MON08-Multilink and others. A few years back I did a GP32 based project.
Overall I was pretty happy with the tools, especially Metrowerks'
CodeWarrior environment. But I found debugging via the MON08 interface
and it's built in ROM to be pretty painfully slow. While debugging it
will not step as fast as you press F10, often you wait 2 to 6 seconds
between every step. I can't say how much of that is program overhead and
how much is MON08, but my work with the HC08QY4 makes me want to point
at the MON08 architecture: Slow serial link & on-board debug ROM code.
Also, I found reliability to be only fair. The serial interface would
often time out, and there are many things that simply can't be debugged
with scheme, e.g. stepping through processor speed changes on a QY4.

Moving forward I would be sure to look at what Motorola adds to their
HCS08 line. The HCS08 family has been a total pleasure to work with.
They have added the Background Debug technology from the HC12 family,
and it has been very reliable for me and much faster. It doesn't consume
on chip resources like serial ports and other I/O lines to implement. Of
course currently they only offer a small variety of MCU's in the family.
Hopefully they will add more at the lower end.

BTW, when working with the QY4, I had a real problem getting P&E's
Prog08z to run under Windows XP, until I tried boosting the privledge
level of the app. Although it was still not perfecty stable, it worked
well enough to use. I made a little batch file to start from an icon:

start /AboveNormal C:\Progra~1\pemicro\pkg08sz\prog08sz.exe

About P&E support, I found it to vary between sometimes poor to mostly
okay, but then I am not a big company buying tons of hardware from them,
you might have better luck.

About the clock on the GP32, my memory is really fuzzy on this, but I
seem to recall having to use an external 4.9152MHz osc if I wanted to be
able to reprogram the MCU in-circuit via the MON08 interface. I could be
wrong here, but I think that was the only option.

Rich says...
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Re: Comments on PE Micro's Cyclone Pro for 6808/6812?

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I'm happy with the Cosmic compiler for the HC05 and HC11 and will most
likely use it for the HC08. A wait of 2 seconds doesn't sound
intolerable (my serial interfaced HC05 emulator is not much faster
than that), but 6 seconds would be quite frustrating.

I rarely use the emulator after the first few builds. After that it is
usually much more useful to be able to simply run new code builds at
full speed for testing. To do this with the HC05 requires
swapping/trashing OTP chips or waiting 30 minutes for a UV erase for a
handful of $50 windowed parts. The flash capability of the HC08 alone
is almost worth the switch.

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The Cyclone Pro uses USB or ethernet comm options to the PC, so that
should eliminate any comm bottleneck between the device and the PC.
I'll have to inquire with PE Micro about the debugging response time
and see if they echo your comments.

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The serial interface between the computer and PE Micro device would
time out? Again, I would hope the newer USB driver would be faster and
more reliable.

As a point of reference, I have the Stingray debugger interface for my
HC05 emulator that somehow succeeds in hanging up to the point that a
reboot of Win2000/XP is required to clear it. Sometimes I have to
cycle power on both the computer and emulator. Yuck. It can't get much
worse than that.

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The problem we have with the HCS08 is that we cannot currently
manufacture SMD boards in-house and the only HCS08 part I see that
offers through-hole is the MC9S08GT32B. But the SDIP package is not
apparently stocked by distributors. We need to stick with a
well-supplied and widely available variant of the HC08 since we buy
small quantities. The HC08GP32 looks like the most stocked part in the
family by distributors in both DIP and QFP packages.

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What particular software/hardware do you use to interact with the BDM
port on the HC12? The Cyclone Pro says it supports BDM on the HCS08
and HC12.

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Hmm. After looking at the software they provide with the Cyclone Pro,
it does look a bit arcane. Is there anyone that produces nice emulator
and flash prog interface software? If so I haven't seen it... sigh.

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We are a small company and won't be a high volume buyer. Your comment
about poor support is a concern.

Michael McCulloch

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