Olin Lathrop wrote: > > > Thank you Wouter! :o) Trouble is that this is for > > ICSP, > > There is no distinction between "in circuit" or not if you are using high > voltage programming. As Wouter said, the trick is to raise MCLR to Vpp > before bringing up Vcc. That may or may not be possible, depending on > your circuit. Thanks Olin, Wouter, everyone. My problem is that i'm using Picstart plus as my ICSP programmer and the hardware is designed already and has a slow Vdd rise time. So I imagine the answer is NO, once 16F628 is programmed and MCLR is an I/O pin, I can't *reprogram* it. :o( -Roman -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu