Or, better still, use removable links to connect the run-time circuitry to the programming pins. It is much harder to accidently mount a link than to slide accidentally a switch. And one side of the link can be part of the ICD connection.. On 21 February 2015 at 22:20, Chris Roper wrote: > Or the old fashioned way - Use a 2 pole 2 way slide switch marked as RUN = / > TEST to isolate the MCLR and PCG when you need to debug. > > __________________________________________ David C Brown 43 Bings Road Whaley Bridge High Peak Phone: 01663 733236 Derbyshire eMail: dcb.home@gmail.com SK23 7ND web: www.bings-knowle.co.uk/dcb --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .