Post by thread:[PIC] debugging w/ 16F628A

Is it possible to run the ICD-2 debugger on a 16F628A? When I connect, I get the following message: ICDWarn0020: Invalid target device id (expected=0x89, read=0x83) 0x83 is the correct ID for a 16F628A -- I'm not sure where the 0x89 is coming from? I'm also have problems programming the device if using target power (3.3V). Hmm, wonder if I need to shorten my cables? Programming using ICD-2 power (5V) seems to work just fine. Cliff -- ======================= Cliff Brake http://bec-systems.com

> Is it possible to run the ICD-2 debugger on a 16F628A? IIRC the 16F628A lacks the on-chip debugger hardware, so the ICD-2 would be restricted to rpogramming only. But I am sure this is explained in de docs. Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: http://www.voti.nl consultancy, development, PICmicro products docent Hogeschool van Utrecht: http://www.voti.nl/hvu

On 4/20/05, Wouter van Ooijen <spam_OUTwouterTakeThisOuTvoti.nl> wrote: > > Is it possible to run the ICD-2 debugger on a 16F628A? > > IIRC the 16F628A lacks the on-chip debugger hardware, so the ICD-2 would > be restricted to rpogramming only. But I am sure this is explained in de > docs. Thanks all for the information. Yes the information is in the datasheet, it is just taking me awhile to sort everything out. One point of confusion is MPLAB tells me the 16F628A supports limited debugging, but I guess they assume you have the header board. How do people use the debugger w/ 3.3V systems? I suppose one could program using the ICD-2 power, and then switch to target power for debugging? Also, do other parts such as the 18F1220 support using the debugger with standard 18 pin parts as opposed to using a debugging header, etc. I'm wondering if it may just be easier to switch to another part for development or I might just stick w/ blinky LEDs and print statements. There still seems to be some conflicting information. On the web site: =========================================== PIC16F648A, PIC16F628A*, PIC16F627A* * Note: MPLAB ICD 2 can program these devices, but they do not have in-circuit debug capabilities. It is recommended to use the PIC16F648A with programs not exceeding their respective memory sizes for developing programs for these parts. =========================================== But in the IC2 Header docs: =========================================== The ICD device has an integrated ICD peripheral. The ICD peripheral is not available in regular (non-ICD) devices; therefore these regular PICmicro devices cannot be used directly with the MPLAB ICD 2. The ICD device uses the ICD pin to enable the background debug mode. (See "Schematics" on page 5.) =========================================== So what is an ICD device? It is a special PIC that comes w/ the header board, or is it just a 16F648A? Thanks, Cliff -- ======================= Cliff Brake http://bec-systems.com

At 09:06 AM 4/20/2005, Cliff Brake wrote: {Quote hidden}>There still seems to be some conflicting information. On the web site: > >=========================================== >PIC16F648A, PIC16F628A*, PIC16F627A* > >* Note: MPLAB ICD 2 can program these devices, but >they do not have in-circuit debug capabilities. >It is recommended to use the PIC16F648A with >programs not exceeding their respective >memory sizes for developing programs for >these parts. > >=========================================== > >But in the IC2 Header docs: > >=========================================== >The ICD device has an integrated ICD peripheral. The ICD >peripheral is not available in regular (non-ICD) devices; therefore >these regular PICmicro devices cannot be used directly with the >MPLAB ICD 2. The ICD device uses the ICD pin to enable the >background debug mode. (See "Schematics" on page 5.) >=========================================== > >So what is an ICD device? It is a special PIC that comes w/ the >header board, or is it just a 16F648A? Microchip supplies a special ICD header board with a 16f648-ICD chip on-board. The header also has the RJ-12 connector to go off to the ICD2. The 16f648-ICD is in a larger (longer) package and had dedicated lines for Vpp and the programming clk & data lines. You would use this header board to develop projects for the '648, '628 and '627 parts. dwayne -- Dwayne Reid <.....dwaynerKILLspam@spam@planet.eon.net> Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax Celebrating 21 years of Engineering Innovation (1984 - 2005) .-. .-. .-. .-. .-. .-. .-. .-. .-. .- `-' `-' `-' `-' `-' `-' `-' `-' `-' Do NOT send unsolicited commercial email to this email address. This message neither grants consent to receive unsolicited commercial email nor is intended to solicit commercial email.