One more thing.=20 ICD4 wont work with MPLAB 8.92 its not currently supported.=20 Some of us old hacks still work in assembly=20 Steve -----Original Message----- From: piclist-bounces@mit.edu On Behalf Of Brent Brown Sent: 11 April 2018 00:27 To: piclist@mit.edu Subject: Re:[PIC:] ICD4 I wrote: > ICD4 (DV164045) looks to be on special on microchipdirect.com till the=20 > end of the month. Usually USD250, now USD180 with voucher code. > Seems like a good deal. I've ordered one to replace my trusty (not=20 > that > trusty) ICD3 that's done a few miles. Does anyone know if they're as =20 > good as they should be? eg. claims to be quicker programming. Received the ICD4 last week. Notes & comments so far, maybe useful, maybe not... - ICD4 cannot provide any target power unless an external power adaptor is connected. The ICD3 on the other hand can provide target power from the USB supply alone, and has no connection for external power. - The external power adaptor required is 9V DC. There are few places in the documentation that state this. It's a 2.5mm pin DC jack, centre positive (a= s expected, but not stated anywhere I could find). Nor is there anything I ca= n find that states the range of acceptable DC input voltage. - Programmer won't program if it detects residual power on the programming pins (comes up with a warning and won't let you continue), not a problem with ICD3.=20 While this seems like a reasonable precaution, it can create some problems. It doesn't seem to be a feature that the user can confgure (set threshold) or turn off, using MPLABX IDE v4.15 anyhow. The project I am working on presently will ultimately be battery powered, but for development it's powered by the ICD. I have an FTDI USB/USART cable connected to the uC serial port for debugging... TXD from PC pushes up the uC supply rail enoug= h to bring up the warning. Fixed by adding 10k in series with TXD and 1k across uC VDD/VSS... works, just kind of a hassle. Would be nice to plug in a programmer/debugger and have it work without modifying the hardware. - The ICD4 is taller and heavier than the ICD3, and has a metal (aluminium) case. - The LED bar across the top of the ICD4 looks cool. -- http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/chang= e your membership options at http://mailman.mit.edu/mailman/listinfo/piclist --=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 .