Hello David,Can U please share ur ideas on how to go about this.I will share about how I approached 1. initialisation2. check line is it ringing and on hook3...
Paul, The MC68HC912DT128A chip is not the best part for you to be using. I recommend that you switch over to the MC68HC912DT128C since that is a drop in...
Darci, Can you specify why the C chip would be better than the A? Also, the documentation for the A _seems_ to indicate that FPOPEN is there in our mask set....
Paul, If you pull up the latest specification from the web http://e-www.motorola.com/brdata/PDFDB/docs/MC912DT128A.pdf and read pages 455 to 457 and it will...
Hi all, I am looking for 32 bit fixed point math routines. Any help would be appreciable. Mike [Non-text portions of this message have been removed]...
Hi Darci, The pdf file you mention is the primary reference I use in developing for this chip. I had read the appendix on page 455-457 and it _seems_ to say ...
The book "Starting Forth" by Leo Brodie (if memory serves) has an excellent section on fixed point math. Even though it is written for Forth, it is pretty...
I am interested in anyone's experience with chips to control the reset line of the HC12 family, or specifically the MC68HC912DT128A. We are beginning to...
Paul, The 3K91D and the 0L05H do not have the FPOPEN feature. The 3K91D is equivalent with the 0L05H but not equivalent with the 1L05H or the 2L05H. The...
We use the Analog Devices ADM809LART with the DG128A processor and have never had any problems. It comes in a SOT-23 package. We have been running the...
Killingsworth, Steve
steve.killingsworth@...
May 1, 2003 6:44 pm
2960
MC34164P-5 with the DG128A - no problems. ... From: Ed Taylor [mailto:eeetee@...] Sent: Thursday, May 01, 2003 2:52 PM To: 68HC12@yahoogroups.com ...
Jeff McKnight
jeffmcknight@...
May 1, 2003 7:50 pm
2961
Hi Darci, On page 126 of MC68HC912DT128A.pdf under EEMCR, note 2 says, "2. The FPOPEN bit is available only on the 0L05H and later mask sets. For previous...
... Good compilers (Cosmic, Hiware) have optimized math routines. AFAIR, a long/long division takes approx. 200 cycles. It's worth the money to buy a good...
Oliver Betz
list_ob@...
May 1, 2003 8:09 pm
2963
... This can (and will) be the case if your crystal oscillator starts slower than reset is released, e.g with the mentioned 34064 and Vcc rise time shorter...
Oliver Betz
list_ob@...
May 1, 2003 8:10 pm
2964
Hi Paul, I have sent you a email off line on this. For the rest of the groups information, I am sure, the 3K91D and 0L05H do not have the FPOPEN bit. Regards,...
Hi All, I'm in the process of designing an MCU board using a 9S12DP256. I want to use a crystal and generate the clock internally. I have used to recommended...
Hello everyone, What I am trying to do is to load a small program into my main program that works off an interrupt. The event that I want to cause the...
After similar problems with the Flash as you described, we used the MAX6328UR29 (SOT23-3 package). For some safety reasons we had to use a very low switch...
Excuse my ignorance here, but is it necessary to use a reset device if using the S12DP256 in single chip mode (no external devices that need to be sychronised...
... What's the advantage of this 1$-IC over a 0,2$ *809? Oliver -- Oliver Betz, Muenchen...
Oliver Betz
list_ob@...
May 2, 2003 9:58 am
2970
... I don't know the S12DP256, and the OP asked for a MC68HC912DT128A. It depends on the connected clock circuit and the Vcc rise time. The D60A (likely the...
Oliver Betz
list_ob@...
May 2, 2003 9:58 am
2971
To Oliver The hardware designer of this project is no longer in our company. The problem occured after he went, and I chose this device in my function as ...
Ryan, There are a few things to notice when designing with a crystal for the 9S12DP256: When PE7/XCLKS is pulled high during Reset, the DP256 expects an...
Doron Fael
doronf@...
May 2, 2003 2:05 pm
2974
Dan, Did you give thought to how you are going to resolve the debouncing of the SPST switch? Debouncing is a by-product of mechanical switches that creates...
Doron Fael
doronf@...
May 2, 2003 2:12 pm
2975
Thank you Doron, No I didnt consider the debouncing of the switch. I will check that out. Maybe I could throw a delay subroutine in the beginning of the...
Where is the best resource to learn how to design clock circuits for the HCS12DP256.. I would prefer to not use a clock in a box, however I do not yet know how...
Is the crystal frequency upper limit for the DP256 different than that of the DG128A? On March 18, 2002 Motorola announced in this forum that there was an...
Killingsworth, Steve
steve.killingsworth@...
May 2, 2003 3:35 pm
2978
Does anyone know of an A/D calibration algorithm that does NOT require floating point operations? This e-mail and any files transmitted with it (« Message »)...
Having problems with message search?
Fill out this form to ensure your group is one of the first to be migrated to the new message search system.
