MCLR, Pull-up,Pull-down with ICD2 clone - Electronic Circuits Projects Diagrams Free

GRC · 1st January 2007, 11:06 PM

Hey gang
Tell me if this sounds odd. When using an ICD2 clone, the device programs
and erases much more reliably when a 10K ohm resistor is connected to VSS
and the PIC's MCLR pin(Pull-down). However when the PIC is not connected
to the ICD2 clone and is running on its own the the 10k ohm resistor needs
to be connected to VDD and the PIC's MCLR pin(Pulled-up).

Does this seem funny to you also.

**Nigel Goodwin** · 1st January 2007, 11:19 PM

Yes, with an ICD2 clone there are three possible states for MCLR:

1) 0V - device in reset.
2) 5V - device running.
3) 13V - device in programming mode.

I suspect you have a problem somewhere?.

GRC · 2nd January 2007, 12:52 AM

Thanks for the reply Nigel.
I believe I understand what your saying.
By the way I started working my way through some of
your tutorials(well loosely anyway) using the 16F88.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Title	Starter	Forum	Replies	Latest
PCMCIA to RS232 for ICD2 clone	clockdoctor	Micro Controllers	6	7th April 2008 11:10 PM
ICD2 Clone (Lothar Stolz) on MPLAB 7.40 ?	TiagoSilva	Micro Controllers	10	3rd July 2006 06:19 PM
n00b ICD2 and MCLR question	DanD	Micro Controllers	5	8th May 2006 03:05 AM
Anyone need ICD2 clone info?Here's mine.	Alex_rcpilot	Micro Controllers	2	15th February 2006 07:01 PM
ICD2 Clone with MPLAB 7.30?	Mike, K8LH	Micro Controllers	1	24th December 2005 10:18 PM

1st January 2007, 11:06 PM	(permalink)
GRC	MCLR, Pull-up,Pull-down with ICD2 clone Hey gang Tell me if this sounds odd. When using an ICD2 clone, the device programs and erases much more reliably when a 10K ohm resistor is connected to VSS and the PIC's MCLR pin(Pull-down). However when the PIC is not connected to the ICD2 clone and is running on its own the the 10k ohm resistor needs to be connected to VDD and the PIC's MCLR pin(Pulled-up). Does this seem funny to you also.

1st January 2007, 11:19 PM	(permalink)
Nigel Goodwin	Yes, with an ICD2 clone there are three possible states for MCLR: 1) 0V - device in reset. 2) 5V - device running. 3) 13V - device in programming mode. I suspect you have a problem somewhere?. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

2nd January 2007, 12:52 AM	(permalink)
GRC	Thanks for the reply Nigel. I believe I understand what your saying. By the way I started working my way through some of your tutorials(well loosely anyway) using the 16F88. Last edited by GRC; 2nd January 2007 at 01:18 AM.