Post by thread:[PIC]ICSP of a 16F685

Programming a 16F628A i use RB6 and RB7 for PGC and PGD. But searching on the web and on the Microchip website i dont see anything about this on the 16F685 and looking on the datasheet i cant find PGM and PGD. Is there a document that handles the ICSP -> 16F685 or how should i connect the ICSP to this device. Harry

Greeting Harry, Normally, an ICSP programming will require 5 signals connected to the micro: VPP, VDD, GND, PGC and PGD. The PGM (refer as RB3 sometime) are not required if your programmer can provide a +12V VPP signal. Here is the Microchip programming spec for your reference: http://ww1.microchip.com/downloads/en/DeviceDoc/41204G.pdf Hope the following tutorial also help a bit: http://www.auelectronics.com/Q8.htm Funny N. Au Group Electronics, New Bedford, MA, http://www.AuElectronics.com {Original Message removed}

On Fri, Aug 22, 2008 at 4:26 PM, Harry H. Arends <spam_OUTh.arendsTakeThisOuThome.nl> wrote: > Programming a 16F628A i use RB6 and RB7 for PGC and PGD. > But searching on the web and on the Microchip website i dont see anything > about this on the 16F685 and looking on the datasheet i cant find PGM and > PGD. > > Is there a document that handles the ICSP -> 16F685 or how should i connect > the ICSP to this device. Other names for these pins are ISCPCLK and ICSPDAT Regards, Rob. -- Rob Hamerling, Vianen, NL (http://www.robh.nl)

Harry, RA0 is ICSP Data (PGD) and RA1 is ICSP Clock (PGC). Regards, Jim -----Original Message----- From: .....piclist-bouncesKILLspam@spam@mit.edu [piclist-bouncesKILLspammit.edu] On Behalf Of Harry H. Arends Sent: Friday, August 22, 2008 9:27 AM To: 'Microcontroller discussion list - Public.' Subject: [PIC]ICSP of a 16F685 Programming a 16F628A i use RB6 and RB7 for PGC and PGD. But searching on the web and on the Microchip website i dont see anything about this on the 16F685 and looking on the datasheet i cant find PGM and PGD. Is there a document that handles the ICSP -> 16F685 or how should i connect the ICSP to this device. Harry

Harry H. Arends wrote: > Is there a document that handles the ICSP Yes, it's called the "Programming Spec" for the particular subfamily of PIC you want to program. You might also want to look at my general introduction to ICSP at http://www.embedinc.com/picprg/icsp.htm. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000.

Datasheet 41262a - page 4 The pins have a little different name! PGC (program clock) is ICSPCLK = RA0 = pin 19 PGD (program data) is ICSPDAT = RA1 = pin 18 If you use a breadboard can put a 5 pin strip header starting from pin 18 and ending "two pins" outside the pic. In this manner you have 3 pins ready for ICD2 or PicKit2. With two wire connect VDD and /MCLR. Harry H. Arends wrote: {Quote hidden}> Programming a 16F628A i use RB6 and RB7 for PGC and PGD. > But searching on the web and on the Microchip website i dont see anything > about this on the 16F685 and looking on the datasheet i cant find PGM and > PGD. > > Is there a document that handles the ICSP -> 16F685 or how should i connect > the ICSP to this device. > > Harry >

Harry: ICSP is not listed in the Table of Contents. Try page 215 of the data sheet. Subject: [PIC]ICSP of a 16F685 | Programming a 16F628A i use RB6 and RB7 for PGC and PGD. | But searching on the web and on the Microchip website i dont see anything | about this on the 16F685 and looking on the datasheet i cant find PGM and | PGD. | | Is there a document that handles the ICSP -> 16F685 or how should i connect | the ICSP to this device. | | Harry | --

> The PGM (refer as RB3 sometime) are not required if your programmer can provide a +12V VPP signal. No offence meant, but that is nonsense. First PGM can be on RB3, but also on other pins, depending on the chip. Always check the datasheet or programming spec. Some chips do not have a PGM pin at all. Chips that have a PGM pin, and have LVP enabled in their configuration fuses, can be programmed without the (often ~ 13V) Vpp on the MCLR pin. Disadvantage is that the PGM pin is permanently claimed by this function: you loose one IO pin. Note that the LVP enabling can not be changed by this LVP programming mode. Ex-factory chips have LVP enabled. Some chips that have a PGM pin require that this pin is pulled low during HVP programming (== the standard mode for most programmers). On some chips this seems to depend on the chip revision. Best bet is to pull PGM low, a 10 .. 47 k resistor is sufficient. -- Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: http://www.voti.nl consultancy, development, PICmicro products docent Hogeschool van Utrecht: http://www.voti.nl/hvu

All thanks. Was confused by the different pin names used. -----Oorspronkelijk bericht----- Van: .....piclist-bouncesKILLspam.....mit.edu [EraseMEpiclist-bouncesspam_OUTTakeThisOuTmit.edu] Namens Olin Lathrop Verzonden: vrijdag 22 augustus 2008 16:56 Aan: Microcontroller discussion list - Public. Onderwerp: Re: [PIC]ICSP of a 16F685 Harry H. Arends wrote: > Is there a document that handles the ICSP Yes, it's called the "Programming Spec" for the particular subfamily of PIC you want to program. You might also want to look at my general introduction to ICSP at http://www.embedinc.com/picprg/icsp.htm. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000.