Nicola Perotto ,
Thank you for your reply.
My schematic is very simple.

Just header with PIC16f648A - ICD and external oscillator connected togethe=
r on=20
breadboard.

The header with PIC16f648A - ICD is  connected to ICD3 and powered from ICD=
3 directly.

I found out that
PIC16f648A - ICD has pins 1-9 compatible with the PIC16f648A  and  20-28 pi=
ns of
   PIC16f648A -ICD should be the same as pins  10-18 of PIC16f648A.

PIC16F648A has pin 15 (RA6)and 16(RA7) for the CLKOUT and CLKIN respectivel=
y, so I=20
connected external oscilator to pins 25 and 26 of PIC16f648A - ICD that sho=
uld be pins of 15=20
and 16 of PIC16f648A=20
Here it is my very simple program that I tried to debug( after compilling a=
nd programming)
(I think that P16F628A =3DP16F648A)




	LIST P=3DP16F628A, R=3DDEC    ; Use the PIC16F628 and decimal system=20

        #include "P16F628A.INC"  ; Include header file=20
	__CONFIG _CP_OFF & DATA_CP_OFF & _LVP_OFF & _BOREN_OFF &=20
_MCLRE_ON & _WDT_OFF & _PWRTE_OFF & _XT_OSC=20
=20
		org 0
		bcf	STATUS,RP1
		bsf STATUS,RP0		;bank1
        		movlw 0x0C          =20

		END


But I receive an error

ICD3Err0040: The target device is not ready for debugging.Please check your=
 configuration=20
bit settings and programthe device before proceeding.Stepping target failed

Can anyone help?
Thanks

L.




> Hi,
> to support you we need more complete and organized information!
> Please send a schematic of your circuit...
>        N
>=20
>=20
> --=20
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist


--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.