Dec 28, 2007 #1 A abdalla Member level 4 Joined Mar 22, 2006 Messages 79 Helped 2 Reputation 4 Reaction score 1 Trophy points 1,288 Activity points 1,802 Icd2 Clone : Question ? Hi, I saw strange something in the Schematic ,In MCu PIC16F877A-I/P there is only one pin of the crystal is connected and the other is not connected...can anyone explain this to me ?? thx
Icd2 Clone : Question ? Hi, I saw strange something in the Schematic ,In MCu PIC16F877A-I/P there is only one pin of the crystal is connected and the other is not connected...can anyone explain this to me ?? thx
Dec 28, 2007 #2 blueroomelectronics Advanced Member level 5 Joined Sep 17, 2006 Messages 1,681 Helped 180 Reputation 358 Reaction score 77 Trophy points 1,328 Location Toronto, Canada Activity points 8,696 Icd2 Clone : Question ? Poorly drawn schematic perhaps. Can you post the image?
Dec 28, 2007 #3 A abdalla Member level 4 Joined Mar 22, 2006 Messages 79 Helped 2 Reputation 4 Reaction score 1 Trophy points 1,288 Activity points 1,802 Re: Icd2 Clone : Question ? blueroomelectronics said: Poorly drawn schematic perhaps. Can you post the image? Click to expand... Hi, No it wasn`t ,,I made ICD2 of PiCs design and only one pin was connected then when i tried to look in potyo design i found its the same. below is potyo schematic screenshot
Re: Icd2 Clone : Question ? blueroomelectronics said: Poorly drawn schematic perhaps. Can you post the image? Click to expand... Hi, No it wasn`t ,,I made ICD2 of PiCs design and only one pin was connected then when i tried to look in potyo design i found its the same. below is potyo schematic screenshot
Dec 28, 2007 #4 folks Full Member level 3 Joined Oct 30, 2006 Messages 179 Helped 32 Reputation 64 Reaction score 14 Trophy points 1,298 Location Guadalajara Activity points 2,337 Icd2 Clone : Question ? yes all is ok, and is one pin because the buffer output of PIC 4550 is the input of 877A and this works as external clock an not as oscillator
Icd2 Clone : Question ? yes all is ok, and is one pin because the buffer output of PIC 4550 is the input of 877A and this works as external clock an not as oscillator
Dec 28, 2007 #5 A abdalla Member level 4 Joined Mar 22, 2006 Messages 79 Helped 2 Reputation 4 Reaction score 1 Trophy points 1,288 Activity points 1,802 Re: Icd2 Clone : Question ? folks said: yes all is ok, and is one pin because the buffer output of PIC 4550 is the input of 877A and this works as external clock an not as oscillator Click to expand... But is it stable design ?.... and if i want to put crystal instead of this is there any way for that ? thx
Re: Icd2 Clone : Question ? folks said: yes all is ok, and is one pin because the buffer output of PIC 4550 is the input of 877A and this works as external clock an not as oscillator Click to expand... But is it stable design ?.... and if i want to put crystal instead of this is there any way for that ? thx
Dec 28, 2007 #6 folks Full Member level 3 Joined Oct 30, 2006 Messages 179 Helped 32 Reputation 64 Reaction score 14 Trophy points 1,298 Location Guadalajara Activity points 2,337 Icd2 Clone : Question ? Yes, is very stable. here is the internal invert buffer: And yes you can put a crystal instead of a external clock but you waste your money and your time.
Icd2 Clone : Question ? Yes, is very stable. here is the internal invert buffer: And yes you can put a crystal instead of a external clock but you waste your money and your time.