|
Before I commit to a PCB I am looking for a couple of reference designs that work to check my design against !!!! I am using an MC9S12DP256 microcontroller with an AM29F800B (512k byte X 16 bit wide) flash memory chip for external program memory. I want to be able to use the P&E BDM multilink and their programming software to program the flash. If anyone has a reference design please email it to me or fax it to me at 972.753.2643 Any help would br greatly appreciated. Steve |
|
|
Looking for reference design - HCS12 with external flash - expanded wide mode
Started by ●February 10, 2003
Reply by ●February 10, 20032003-02-10
|
Steve, Download AN2287 from the web. Regards, Gordon wrote: > Before I commit to a PCB I am looking for a couple of reference > designs that work to check my design against !!!! I am using an > MC9S12DP256 microcontroller with an AM29F800B (512k byte X 16 bit > wide) flash memory chip for external program memory. I want to be > able to use the P&E BDM multilink and their programming software to > program the flash. > > If anyone has a reference design please email it to me or fax it to > me at 972.753.2643 > > Any help would br greatly appreciated. > > Steve > -------------------- > > ">http://docs.yahoo.com/info/terms/ -- =============================================================== Gordon Doughman Ph: 937-438-6811 Motorola Semiconductor Fax: 937-434-7457 Field Applications Engineer Pager: 800-759-8352 Pin: 1304089 Suite 175 3131 Newmark Drive Miamisburg, OH 45342 Check out my HC12 book at: http://www.rtcgroup.com/books/ |
|
|
Reply by ●February 10, 20032003-02-10
|
Gordon: I have studied AN2287 and derived my design from that document. I was looking for similar designs to evaluate my design against to try to minimize or eliminate "Gotchas" on my circuit board. If you know of any reference designs please let me know? Motorola promised reference designs in app note AN2408/D (page 27 in AN2287), but it has not been released yet. Steve Dillier 972.753.2622 voice --- In , Gordon Doughman <g.doughman@m...> wrote: > Steve, > > Download AN2287 from the web. > > Regards, > Gordon > > sdillier@h... wrote: > > > Before I commit to a PCB I am looking for a couple of reference > > designs that work to check my design against !!!! I am using an > > MC9S12DP256 microcontroller with an AM29F800B (512k byte X 16 bit > > wide) flash memory chip for external program memory. I want to be > > able to use the P&E BDM multilink and their programming software to > > program the flash. > > > > If anyone has a reference design please email it to me or fax it to > > me at 972.753.2643 > > > > Any help would br greatly appreciated. > > > > Steve > > > > > > -------------------- > > > > > > > > ">http://docs.yahoo.com/info/terms/ > > -- > =============================================================== > Gordon Doughman Ph: 937-438-6811 > Motorola Semiconductor Fax: 937-434-7457 > Field Applications Engineer Pager: 800-759-8352 Pin: 1304089 > Suite 175 > 3131 Newmark Drive > Miamisburg, OH 45342 > > Check out my HC12 book at: > http://www.rtcgroup.com/books/ |
|
|
Reply by ●February 11, 20032003-02-11
|
Ask Motorola through technical support and also look at axiom web site. There is a little disparity in Motorola's advice which is; The address latch hold time should be 0nS but actually the best I can do in theory is 1.5nS + one gate delay. Having said that the address does not change to data for a number nS after enable theoretically. I wonder if anyone has had a problem with this last aspect, I am also advised that programmable logic probably would not be fast enough. It is also difficult to check that the external devices, RAM/ROM etc. drive to good 5V levels. Andrew Lohmann AIIE Design Engineer Bellingham + Stanley Ltd. Longfield Road, Tunbridge Wells, Kent, TN2 3EY, England. Tel: +44 (0) 1892 500400 Fax: +44 (0) 1892 543115 Website: www.bs-ltd.com ----- Original Message ----- From: <> To: <> Sent: Monday, February 10, 2003 7:57 PM Subject: [68HC12] Re: Looking for reference design - HCS12 with external flash - expanded wide mode > Gordon: > > I have studied AN2287 and derived my design from that document. I > was looking for similar designs to evaluate my design against to try > to minimize or eliminate "Gotchas" on my circuit board. If you know > of any reference designs please let me know? Motorola promised > reference designs in app note AN2408/D (page 27 in AN2287), but it > has not been released yet. > > Steve Dillier > 972.753.2622 voice > > --- In , Gordon Doughman <g.doughman@m...> > wrote: > > Steve, > > > > Download AN2287 from the web. > > > > Regards, > > Gordon > > > > sdillier@h... wrote: > > > > > Before I commit to a PCB I am looking for a couple of reference > > > designs that work to check my design against !!!! I am using an > > > MC9S12DP256 microcontroller with an AM29F800B (512k byte X 16 bit > > > wide) flash memory chip for external program memory. I want to be > > > able to use the P&E BDM multilink and their programming software > to > > > program the flash. > > > > > > If anyone has a reference design please email it to me or fax it > to > > > me at 972.753.2643 > > > > > > Any help would br greatly appreciated. > > > > > > Steve > > > > > > > > > -------------------- > > > > > > > > > > > > ">http://docs.yahoo.com/info/terms/ > > > > -- > > =============================================================== > > Gordon Doughman Ph: 937-438-6811 > > Motorola Semiconductor Fax: 937-434-7457 > > Field Applications Engineer Pager: 800-759-8352 Pin: 1304089 > > Suite 175 > > 3131 Newmark Drive > > Miamisburg, OH 45342 > > > > Check out my HC12 book at: > > http://www.rtcgroup.com/books/ > > -------------------- > > ">http://docs.yahoo.com/info/terms/ > > > --- Email Disclaimer --- > > Internet communications are not secure and therefore Bellingham + Stanley Ltd does > not accept legal responsibility for the contents of this message. Any views > or opinions presented are solely those of the author and do not necessarily > represent those of Bellingham + Stanley Ltd unless otherwise specifically stated. > If this message is received by anyone other than the addressee, please > notify the sender and then delete the message and any attachments from your > computer. > > --- End --- > --- Email Disclaimer --- Internet communications are not secure and therefore Bellingham + Stanley Ltd does not accept legal responsibility for the contents of this message. Any views or opinions presented are solely those of the author and do not necessarily represent those of Bellingham + Stanley Ltd unless otherwise specifically stated. If this message is received by anyone other than the addressee, please notify the sender and then delete the message and any attachments from your computer. --- End --- |
Reply by ●February 11, 20032003-02-11
|
Steve, Designing with the DP256 and external memory is something that I don't recommend for general DP256 and HCS12 users. There are several potential places you may fall with when designing with external memory for the DP256. A few of them are outlined in AN2287, but not all are thoroughly covered by it. This recommendation is based on my experience as a designer of full-featured emulators for the HCS12. In the case of full-featured emulators the external bus must be used, so I had to resolve these problem and did, but it has involved much effort. You can check the following two alternative routs for your application: 1. If you require more program memory, see if you can get the DP512 which is mentioned at: http://e-www.motorola.com/brdata/PDFDB/docs/HCS12DFAMILYPP.pdf It has 512K of Flash on chip which may be enough for your code. 2. If you need an even bigger flash in order to store large tables of non-volatile data, please look into operating the DP256 in Single Chip mode and read/write the external flash device through special read and write routines that will manipulate general-purpose port pins. This will be a slower way, but more safe timing-wise than using the external bus. You can use the same PORT A, B, E and K pins (except for PE4 which is ECLK I think), but manipulate them as port pins rather than bus pins. You would still probably need the voltage translation as outlined in AN2287. Hope this helps, Doron Nohau Corporation HC12 In-Circuit Emulators www.nohau.com/emul12pc.html At 07:57 PM 2/10/2003 +0000, you wrote: >Gordon: > >I have studied AN2287 and derived my design from that document. I >was looking for similar designs to evaluate my design against to try >to minimize or eliminate "Gotchas" on my circuit board. If you know >of any reference designs please let me know? Motorola promised >reference designs in app note AN2408/D (page 27 in AN2287), but it >has not been released yet. > >Steve Dillier >972.753.2622 voice > >--- In , Gordon Doughman <g.doughman@m...> >wrote: > > Steve, > > > > Download AN2287 from the web. > > > > Regards, > > Gordon > > > > sdillier@h... wrote: > > > > > Before I commit to a PCB I am looking for a couple of reference > > > designs that work to check my design against !!!! I am using an > > > MC9S12DP256 microcontroller with an AM29F800B (512k byte X 16 bit > > > wide) flash memory chip for external program memory. I want to be > > > able to use the P&E BDM multilink and their programming software >to > > > program the flash. > > > > > > If anyone has a reference design please email it to me or fax it >to > > > me at 972.753.2643 > > > > > > Any help would br greatly appreciated. > > > > > > Steve > > > > > =============================================================== > > Gordon Doughman Ph: 937-438-6811 > > Motorola Semiconductor Fax: 937-434-7457 > > Field Applications Engineer Pager: 800-759-8352 Pin: 1304089 > > Suite 175 > > 3131 Newmark Drive > > Miamisburg, OH 45342 > > > > Check out my HC12 book at: > > http://www.rtcgroup.com/books/ |
