Home     Products     Ordering     Support     Forums     Search     Downloads     FAQ     About     Contacts   4 Sep 2010 19:04:13 Latest News Search Acqura Subscribe to our newsletter Login Register There are 19 Guest users online. Products   Emulation Tools     8xC51 Family     LPC76x Family     8xC51MX Family     LPC900 Family     Choosing an     Emulator   Programmers   Adapters   Bondouts/Spares   Repairs   Microcontroller Sales Ordering   Show My Cart   Proceed to Checkout Support   Downloads   Forums   Links and Resources   Data Sheets   Technical Notes   Testimonials   FAQ   Common Problems   Repairs and Returns   Contacting Us   About Acqura Take our Poll When programming ARM microcontrollers, what is your preferred language? Assembler C Pascal Modula-2 Other    Free polls from Pollhost.com Ground differential This thread was started in the External Interfacing Forum by user dean2t on 15-7-2005 15:07 To add a posting to this thread, click on the message you wish to reply to. Your reply will be inserted at that point in the thread. Topic Posted User * Ground differential When using an external interface to a pcb, you have 2 power supplies involved. One power supply is the PDS900 supply and the other is your supply for your board in development. My question is this: In order or preserve the PDS900''s operation, there should be no differences in the grounds of each board. Is it safe to connect the ground pin on the PDS900 (lower left hand corner to the ground of the development PCB to keep the voltage differentials negligible? Reply to this post 15-7-2005 15:07 Views: 1780 dean2t RE: Ground differential Hi Dean, Under ''normal'' conditions you would have seperate supplies for your target and emulator. However, the PDS900 internal programmable power supply may be able to provide enough current for your target. Please refer to the PDS900 hardware users manual on it''s capabilities and constraints. The PDS900 earth pin that you refer to is the same point (potential wise) that is taken to the footprint adaptor Vss pin. So there would be no need to specifically connect it. Regards, Graham Reply to this post 17-7-2005 18:55 Views: 1734 Support Start new topic in the External Interfacing forum Show all topics in the External Interfacing forum Show all forums Show all my postings Show all threads added to since my last visit Show all threads with no replies info@acqura.com Home Last modified on Tue Apr 20 19:53:16 CDT 2004 Copyright © 2008. Acqura Systems All rights reserved. Counter