There is no pin-compatible replacement processor, at least not in a
compatible package.
I could use a C8051F300 which is available in a 14 pin SO package, but I
have not had time to switch the software over to that chip. It would not be
too hard to wire the SO-14 package to an existing board
Hi all,
About a month ago I sought advice from list members regarding a
dysfunctional fluke.l monitor for my Thunderbolt GPS receiver. Someone
suggested that I contact Bob at fluke.l to see what he would do. I took
that advice and thought some of you would be interested where I am now.
Plus,
I seem to remember someone on this list posting that the original processor
was no longer available so this required a board change to accommodate a
new processor. I think the new processor also requires 3.3vdc but if you
Google the chip's part number I'm sure you can find all the specs and this
I've heard this discussed a few times, and the idea of using diodes to
regulate this way makes me very queasy.
Why would a real 3.3V regulator not be used?
If the new chip requires 3.3 vdc and there aren't 3 diodes on the board to drop
the 5 vdc down,
Hi Steve:
The last couple of board versions have a 3-terminal voltage regulator on
board. See the photos at:
http://www.prc68.com/I/ThunderBolt.shtml#8051PCB
Have Fun,
Brooke Clarke
http://www.PRC68.com
Steve wrote:
Hi all,
About a month ago I sought advice from list members regarding a
The replacement board looks like the one pictured on Brooke's web site.
Same processor as the older board. Hope to get it installed this evening
or tomorrow, I'll post the results.
Thanks all for the help.
Steve
On 7/6/2011 5:11 PM, Brooke Clarke wrote:
Hi Steve:
The last couple of board
measurementtime-nuts@febo.com
Reply-To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: [time-nuts] fluke.l monitor for Thunderbolt . . . the saga continues
Hi all,
About a month ago I sought advice from list members regarding a
dysfunctional fluke.l monitor for my
