Thank you, Peter. I am just in the planning stages of the project so I have a lot of = questions. Two meg of memory is about what I would like to design in. = Also, I would like a 24 bit serial A/D so I thought I could use a SPI port = for that. I understand that the clock on the Atmel processor produces some = transients that cause errors in the conversion, so I will watch out for = that. However, some transients that appear on 2 sided boards do not appear = on 4 layer boards because the ground trace and decoupling issues are reduce= d = if not eliminated. Running at 40 MHz can create significant rf challenges. I am thinking of using BASIC or C. I have not settled on it yet. I am = not new to design but I can't say that I am the digital expert either. I d= o = have much more experience in analog and power design. So I always welcome = help and criticism in digital, especially microprocessor designs. I was disappointed in the ME development kit I purchased a while back. I a= m = not sure what else is available. For memory, I will look at the 25PE80. ----- Original Message ----- = From: "Peter Feucht" To: "'Microcontroller discussion list - Public.'" Sent: Monday, June 25, 2007 9:47 AM Subject: AW: [EE] anyone worked with PIC24? Hi, Rich, I'm using a flash memory type 25PE80 from ST which has 16MBit =3D 2 Mbyte. It's rather slow, not slow in reading and writing, but as usual with flash it needs to be erased before re-writing and erasing the whole memory needs about 30 seconds!!! You can also make partially erase (what I'm doing by buffering a set of 256 data words in RAM while erasing the flash). My system is rather slow (only 1000 samples/second) so there's plenty of time left. What language and what hardware environment are you using? I decided to use that Mikroelektronika (ME) dsBasic along with a develpment board from ME (LVB24-33). While the board is really good for a fair price, the compiler and the IDE has some severe problems. I saw this later on during working, so I'm not able to insert a simple ASM command (like set PIC to sleep). Also the editor has some strange behaviour like inserting words which are not there at all and after scroll down and up again they disappeared. If you know this, it's OK, but the first time it's somewhat shocking. Let me know some more details of your application and I can send some code snippets of interests (I hope). Regards Peter -----Urspr=FCngliche Nachricht----- Von: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] Im Auftrag von Rich Gesendet: Montag, 25. Juni 2007 14:20 An: Microcontroller discussion list - Public. Betreff: Re: [EE] anyone worked with PIC24? Thanks for the reply. All information is useful. How much memory did you add? I have not worked with SPI before so I want to try it with memory and a 24-bit A/D. ----- Original Message ----- From: "Peter Feucht" To: "'Microcontroller discussion list - Public.'" Sent: Monday, June 25, 2007 3:54 AM Subject: AW: [EE] anyone worked with PIC24? Hi, Rich, I attached an external memory (Flash 25PE80) to an 24H128GP206, but I never used the internal SPI module because it appeared somewhat "cloudy" to me, so I wrote some very basic routines in BASIC, to do the communication. If this is of help for you.... Best regards Peter -----Urspr=FCngliche Nachricht----- Von: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] Im Auftrag von Rich Gesendet: Sonntag, 24. Juni 2007 03:11 An: Microcontroller discussion list - Public. Betreff: [EE] anyone worked with PIC24? Has anyone worked with PIC24 40 MIPS version (any flavor) :o) I am interested to know if anyone has implemented external memory on an SPI port. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist = -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist