49 Threads found on edaboard.com: Pic Vpp
I powered it from 1st MCLR pin, put 8mhz oscillator with capacitors into 13th and 14th pin, connected led to 19th pin and led is not blinking.
??? MCLR/vpp is not the power pin. Must supply VDD pins 11 and 32. Please show your complete circuit.
To simplify the test setup, you can run the pic from internal oscillator. One
Microcontrollers :: 03-17-2017 10:55 :: FvM :: Replies: 13 :: Views: 1316
Easyrider83 is correct, even if the answer isn't what you wanted to hear :smile:
That pin is an input only, you can't use it to control anything outside the pic.
Brian.
Microcontrollers :: 07-12-2016 11:19 :: betwixt :: Replies: 2 :: Views: 318
The document DS31028A page28-4 Figure 28-1 contains a diagram for connections of a "typical ICSP application circuit". It shows how ICSP is to be connected to a pic. It shows connections for MCLRn/vpp, VDD, VSS, RB6 and RB7. I have the following questions:
(1) How are
Microcontrollers :: 05-10-2016 10:29 :: matrixofdynamism :: Replies: 0 :: Views: 341
Hey guys
This is pic Programmer Schematic:
122972
The vpp here is sourced directly from pic pin, is it okay? Shouldn't it be sourced from 5V+ rail?
Also, can I put some other PNP/NPN transistors in the place of those (BF959 and BC328) if I don't have them?
Thanks in advance
Microcontrollers :: 11-07-2015 20:23 :: K33rg4t3 :: Replies: 4 :: Views: 623
I recently discovered - by looking at some of the files in the MPLAB IDE Device folder (see Program Files (x86)\Microchip\MPLAB IDE\Device) - that the nominal programming voltage (vpp) is not always 13 Volt. Some examples (taken from the respective .dev files) are shown below - note that the pics 16F684 & 16F917 are 11 Volt nominal with a maximum
Microcontrollers :: 12-31-2014 03:12 :: ljcox :: Replies: 4 :: Views: 1009
The second schematic is wrong sequence for use in original pickit:
1 - vpp (Mclr)
2 - VDD (+5V)
3 - VSS (GND)
4 - DATA (PGD)
5 - CLOCK (PGC)
6 - AUX (LVP)
Microcontrollers :: 12-24-2014 12:27 :: nagkiller :: Replies: 6 :: Views: 889
Hi,
Assume you do not have it connected to an actual pic chip and using the Trouble Shooting part of the Pk2 program V2.61 ?
Then I would think you have a pcb track short /error of a faulty transistor, so easy to get the pinout the wrong way round; ensure your pinout diagram if for the manuafacturer of the transistor you have, they can vary
Microcontrollers :: 10-18-2014 16:00 :: wp100 :: Replies: 9 :: Views: 1753
Can you post a schematic of the circuit you are utilizing to program the pic? Or is this a commercial development board?
Is this the first time programming the device? Or have you successfully programmed it in a different circuit?
BigDog
Microcontrollers :: 09-10-2014 20:50 :: bigdogguru :: Replies: 4 :: Views: 636
Hi all,
I know ICD2 is obsolete and we can buy ICD3 at less than $200 now. BTW, I needed to debug my code on 16F1827 and most of parts were on hand, I had decided to build a ICD2 clone and a 8.5V vpp limitter. (poyoto rev.B?, using transistors) It took a few days from etching PCB to soldering, now it works fine with old pics like 16F877A. (erase
Microcontrollers :: 02-17-2014 06:19 :: lovefool :: Replies: 1 :: Views: 1041
Check your voltages. Does the pickit need to be powered from your board? Do you have an excessively long cable?
Microcontrollers :: 11-07-2013 17:16 :: barry :: Replies: 13 :: Views: 5517
Dear Friends,
Recently I bought pickit2 programmer with software pickit2 v2.61.00 & 10 number of pic12F508 ICs.
I tried to program these ICs but when I read device I got invalid OSCCAL value. I tried to set it with manual option but i don't know correct value.
I also tried to auto regenerate but error message blinks
"Regenerating (...)
Microcontrollers :: 10-30-2013 12:59 :: snehamatondkar :: Replies: 6 :: Views: 5499
I dont know if the pickit3 has it, but pickit2 has an option for 'Use vpp First Program Entry' under 'Tools'; I'd check that and see if that helps.
Regards,
Anand
Embedded Linux and Real-Time Operating Systems (RTOS) :: 04-27-2013 17:10 :: ard :: Replies: 14 :: Views: 1885
You'll want to review the dedicated Flash Microcontroller Programming Specification at microchip.com.
A typical vpp specifcation is VDD+4.0...12.5 V.
Microcontrollers :: 03-01-2013 16:59 :: FvM :: Replies: 3 :: Views: 1078
can i use MCLR/vpp/RE3 pin of pic18f4550 pic microcontroller for multifunction..can i use this pin as I/O though i have used this pin for icsp connector at same time????
Microcontrollers :: 02-04-2013 05:23 :: pritee :: Replies: 2 :: Views: 476
Hi Guys,
I have generated some PWM from pic microcontroller using my input data. Now i want to know how to reduce the peak to peak output voltage of the PWM, presently it is coming very high around 600mv but i want this value around some 100mv. so can anybody help me in this regard.
hridz
Microcontrollers :: 05-14-2012 10:36 :: hridz :: Replies: 2 :: Views: 762
are you sure that you set 12V in vpp when VDD is 0V?? and after that you set VDD to 5V??? (without lowering vpp)
if so, yes your pic just has been burned. better to watch out next time....
Microcontrollers :: 04-18-2012 19:11 :: Kurenai_ryu :: Replies: 7 :: Views: 658
I used MCLR pin as a general Input to monitor the status of a swich but when a touch is given to that pin by using screw driver, pic resets. I could eliminate this issue after connecting a 0.1microF cap to ground and input pin. This modification was not required when I used an another pin as an input. Can some one explain the real cause fo
Microcontrollers :: 10-17-2011 04:40 :: prasad70 :: Replies: 11 :: Views: 4885
hello,
This circuit is from a pic programmer. The vppON and vpp1ON are connected to the LPT port. I think the transistors operate as switches here, without being very sure.
Could I replace the transistors with 2N2907 and 2N2222 without any other changes to the circuit?
I am worrying a bit about the resulting vpp and (...)
Analog Circuit Design :: 04-12-2011 20:59 :: neazoi :: Replies: 0 :: Views: 622
i am using an ICD2 clone. it has 5 pins for programming PGC, PGD, GND, +5v, and vpp. i don't know what specific pins to connect to the pic that i am using, (pic10f200t).
also, what does PGC and PGD stand for? these are the two pins i am confused of.
regards, drew.
Microcontrollers :: 03-28-2011 06:25 :: brew :: Replies: 1 :: Views: 775
you can use pickit2 for programming most flash pic processors , just connect pins DATA,CLOCK, VDD, GND,vpp from Microcontroller to pickit2
Microcontrollers :: 12-01-2010 15:16 :: rajudp :: Replies: 2 :: Views: 1415
hi all, i've just finished constructing the above programmer. it checks out perfectly when i test it with pickit 2(tools-troubleshooting). however, when i connect a pic(16f628a-16f84a) to the programmer i get error message,"vdd voltage error". shouldn't my usb port supply enuf current to program the chip? need some help. thanks. i've tried three di
PC Programming and Interfacing :: 09-23-2010 21:24 :: pete g :: Replies: 2 :: Views: 1197
Question : are you manually selecting a device from the software or have you kept it to Auto detect?
1N4148 might not work correctly in this application because vpp is derived from a boost converter. 3.94 is way below the limit, it should be around 12volts. this will prevent the pic kit 2 from resetting the microcontroller. are all the capacito
Microcontrollers :: 09-12-2010 18:22 :: spiralbrain :: Replies: 14 :: Views: 9268
Hawk looking at your schematic you need to add a diode in between the logic_5V and R2. The way it is at the moment you will send vpp to 5V.
Also I've noticed that you have missed the 22pf caps on the crystal
wizpic
Microcontrollers :: 07-28-2010 21:27 :: wizpic :: Replies: 20 :: Views: 3695
hav u used the MCLR pin as digital I/O? if so reprogramming/verification becomes a bit problem.
if u hav done it u will hav to mak sure that the pic gets vpp before VDD condition. It can be done using a transistor
Microcontrollers :: 07-08-2010 01:36 :: tijoseymathew :: Replies: 2 :: Views: 1007
Hi every one,
can any one please tell me how to do serial programmining for dspic30f6014A. in this IC i am having active low MCLR, VCC,VSS,PGC,PGD. in general for pic we are having MCLR/vpp but in this microcontroller we are having only active lowMCLR. so can we give 12V to this pin at the time of programming and in (...)
Microcontrollers :: 06-24-2010 05:06 :: hansika :: Replies: 1 :: Views: 1074
Hi,
I have the ICD3 and I need to program a 12F683. The thing is, that I really need one extra pin, so I need to use the GP3/MCLR/vpp pin as IO. My question is, can the ICD3 generate 12V on MCLR to program the pic? I've been through the user guides, but I cannot find this info.
Best regards,
George
Microcontrollers :: 06-02-2010 08:18 :: Mercury :: Replies: 1 :: Views: 2129
YES definitely u can u need to refer the data sheets of the other pic micro controllers
Microcontrollers :: 05-27-2010 14:38 :: sanjubluerock3 :: Replies: 1 :: Views: 814
You didn't tell, in which programming adapter you have found the said strange circuit. I can only say, that common pic programming
adapters, e.g. from Microchip, are using a filtered and stabilized vpp voltage source. You can refer to the pickit 2 schematic, that
has been published from Microchip, or serious third party designs.
Analog Circuit Design :: 04-09-2010 22:25 :: FvM :: Replies: 3 :: Views: 1711
Check it with a separate isp board with just using only the pic. may be ISP pins are shorted or wrongly connected some where in the development board. If it stiill doesnt work, You have BOUGHT it. Return it to the vendor and get a replacement....Cheers
Microcontrollers :: 02-18-2010 06:20 :: pranam77 :: Replies: 2 :: Views: 3851
Hi,
I have bought a new pic kit2.I can program for 100 pin pic but i cant for 64 pin it is saying that vpp n vdd error.i even trouble shooted it but vpp test is saying that short is there.but i could not trace out whats exactly is d problem?can any one help me in this issue.
Thanks.
Microcontrollers :: 09-02-2009 05:22 :: sid_752 :: Replies: 0 :: Views: 639
My easy pic 3 board has gone faulty
when try to program the board i get the low vpp voltage error
i checked the board , replaced the74 c 4053 but problem did nto solved
then i check the board and found this problem
the point , indicated in the picture have shor
Microcontrollers :: 02-20-2009 05:52 :: malik_123 :: Replies: 1 :: Views: 1806
Hi,
I have build Potyo 2 pic programmer but it can't program the dspic target.I connect programmer to USB, it is detected as a new device, I install drivers from MPLAB, download OS,connect to device and error "Can't detect device" settings i see:
Target Vdd:PASS
Module vpp:Low
MCLR Gnd:Pass
MCLR Vdd:Low
MCLR: Low
In Power settin
Microcontrollers :: 02-19-2009 17:12 :: KXLU :: Replies: 0 :: Views: 893
Hi, Viostan,
Did the problem get solved, what was the solution for programming the pic16F877A using Ponyprog2000?
regards
raghavendra
Microcontrollers :: 04-25-2011 09:55 :: ragh1981 :: Replies: 8 :: Views: 4478
There is a programming file that gives those specs somewhere on Microchip. I looked at the table of vpp for all of the 16 series, and they are a real dog's breakfast of Vmin and Vmax. I was quite surprised at the variation. I have no doubt that a good part of the programming problems with pics is out of spec programming voltages.
Microcontrollers :: 08-28-2008 04:50 :: jhbbunch :: Replies: 4 :: Views: 1019
Do you program other pics with this brenner???
Are use brenner in windows vista?? Already exists driver for vista??
But if you dont program other pics, i think you must calibrate the vpp.
Microcontrollers :: 08-08-2008 11:12 :: Eraser :: Replies: 8 :: Views: 3223
Can anyone tell me what is the connector X5 and what we are short-circuit
Same for the J1
pls
thanks to anyone
Microcontrollers :: 02-12-2008 19:58 :: ignatios67 :: Replies: 2 :: Views: 2992
I'd second the pickit 2 or clones, excellent little device.
Microcontrollers :: 01-08-2008 02:45 :: blueroomelectronics :: Replies: 6 :: Views: 1286
I have used Multi pic Programmer 5 Ver_2 and IC-Prog of Bonny Gijzen for program,ming pic16f876a uc.But when I load hex file only small portion of it was loaded.can any one explain me what the problem is?
Ensure that the elecrolytic capacitors used are new and good ones.The vpp has to stay good till you complete the prog
Software Recommendations :: 11-02-2007 15:45 :: mvs sarma :: Replies: 2 :: Views: 274
maybe to long cables...
just use less than 30 cm from the connector to the pic... also try to not use RB7 and RB6 for anything else... also check your MCLR/vpp part... some times it mess... (also check vpp voltages with MPLAB and with multimeter)
just a question (for you) when it has problem at veriying... is the program working? (you (...)
Hobby Circuits and Small Projects Problems :: 08-03-2007 17:44 :: Kurenai_ryu :: Replies: 3 :: Views: 4867
Do you mean an ICSP like an ICD2
Try my tutorial on the subject. Go to my site and look under projects for pic Quick Project "hello world".
Microcontrollers :: 05-31-2007 01:42 :: blueroomelectronics :: Replies: 2 :: Views: 1381
Hi..
I know it might be a silly question, but it's important for me.
Can anyone tell me if this programmer could work with all pic types.?
I mean can I use this programmer with pic18F series?
Thanks very much for all your help.
Microcontrollers :: 01-01-2007 12:19 :: seadolphine2000 :: Replies: 16 :: Views: 3857
1) Connect the pin 10 to the ground via a resistor (10 kohm)
2) Use WINpic800 (free at ) instead of ICPROG. WINpic800 has control over sequence vpp and Vdd and does the programming of pic with internal oscillator activated.
Software Problems, Hints and Reviews :: 09-05-2006 19:16 :: rkodaira :: Replies: 6 :: Views: 11502
That error means that the ICD2 did not find the expected pic on the target circuit (i.e., expected a 16F877A, found a 16F877).
In particular, the "read=0x0" means that the ICD2 was not able to read the target device identification, which means that either: a) it's not connected to a target circuit, b) the target circuit is not powered or c) the
Hobby Circuits and Small Projects Problems :: 12-14-2005 15:58 :: cdallacosta :: Replies: 10 :: Views: 15843
I have built the uJDM programmer to use with ICPROG software in order to write pic16F84A.
( )
The circuit is correct and I have configured the software as it said on the uJDM site, but when I try to write a file to the pic, it doesn't write anything, and the pic stays empty.
did anybody use th
Microcontrollers :: 07-31-2005 08:49 :: tzviel :: Replies: 3 :: Views: 1194
Hi wylee,
If your plans are to update remotely (RF or IR) the flash of pic16F84, you need a slave (second chip) in order to act as a gateway between the remote station and the pic16F84.
Remember how you're programming the pic16F84 ? Using the ICSP (In Circuit Serial Programming) based on hardware two I/O pins plus power, ground and (...)
Microcontrollers :: 03-02-2005 05:28 :: silvio :: Replies: 7 :: Views: 3846
If you are referring to the circuit I posted elsewhere, don't worry, it will reset the pic and do all the reqd. job.
bimbla.
Microcontrollers :: 03-01-2005 11:03 :: bimbla :: Replies: 4 :: Views: 2847
I am using oshon pic programmer which has a schematic similar to that of tait's serial programmer. neither with oshon nor with ic-prog , it is getting programmed.
help!!!!!!!!!!!!!!!!!
:?:
Microcontrollers :: 01-19-2005 15:20 :: g_thiru :: Replies: 1 :: Views: 1374
New low cost kits/module for you:
pic ICD2 clone - $44/$64 (only RS232 interface, switching PSU for vpp and improved design)
AVR ICE-ISP - $44/$64 (AVR JTAG ICE + AVR-ISP)
AVR JTAG miniICE -
Microcontrollers :: 07-18-2004 17:02 :: mk :: Replies: 0 :: Views: 2810
Can anybody say me what is the diference on 18F8720 and 18LF8720?
My e-pic programmer don't programming this device. The pin option are:
PinB5=Ground
PinB6=e-pic
PinB7=e-pic
Mclr/vpp=e-pic
Vdd + Vss
On e-pic software, the Low programming mode are disabed.
Can anybody help me ?? :? (...)
Microcontrollers :: 02-20-2003 15:46 :: cb30 :: Replies: 1 :: Views: 1626