Rob, Can you upload it to my site?
www.ko4bb.com/manuals/ THANKS IN ADVANCE, Didier KO4BB Sent from my BlackBerry Wireless thingy while I do other things... -----Original Message----- From: "Rob Kimberley" <[email protected]> Sender: [email protected] Date: Tue, 31 Jan 2012 21:14:59 To: 'Discussion of precise time and frequency measurement'<[email protected]> Reply-To: Discussion of precise time and frequency measurement <[email protected]> Subject: Re: [time-nuts] FE-.5680A trimming resolution If anyone is interested, I have just got hold of a PDF of the Technical Manual TM 5680-0211 for 5680A series Rubidiums. Please contact me off list for a copy (1M, so too large to post on [email protected]) Rob Kimberley -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Attila Kinali Sent: 31 January 2012 20:47 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] FE-.5680A trimming resolution On Tue, 31 Jan 2012 21:06:04 +0100 Javier Herrero <[email protected]> wrote: > El 31/01/2012 20:43, Attila Kinali escribi : > > My current progress is that the uC i wanted to use does not do what > > i want. Can anyone recommend a uC with 32bit timers and IEEE 1588 support? > You can have a look on these > http://www.ti.com/mcu/docs/mculuminaryfamilynode.tsp?sectionId=95&tabI > d=2597&familyId=1756 Some of them have IEEE-1588, like the LM3S9B96 This was exactly the device i intended to use. But it doesnt really have 32bit timers. They cascade two 16bit timers to get 32bit, but then all kind of restrictions apply which make the timers unusable. And when using 16bit timers, i'll get an overflow every 800us (at 80MHz clock). I browsed trough the internets and could find the following devices: LPC18xx (NXP): Look nice, but still in development or early production. I especially like that they (will be) are available in a 200 pin QFP. This would enable to use all the functions of the chip while still being able to solder one by hand. K60 (Freescale): Hell of a confusing documentation. Also quite new. Have only 16bit timers. A big issue is that they have a crypto unit on chip, which makes them export restricted. Ie the only way to buy them is from a local distributor which makes them expensive. STM32-F2/F4 (ST): ST doesn't want to give me the documentation to those. (website fails w/o error message) I havent found any other chips yet. Sofar the options i see are: * wait for the LPC18xx become available in quanities (can take a year) * Use a LM3S9B96 together with a small FPGA to implement the counter functions. Any hints appreciated Attila Kinali -- Why does it take years to find the answers to the questions one should have asked long ago? _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
