Home     Products     Ordering     Support     Forums     Search     Downloads     FAQ     About     Contacts   19 May 2013 12:47:01 Latest News Search Acqura Subscribe to our newsletter First Time Visitor Login Register There are 4 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 IIC Pull-up Resistor value This thread was started in the Serial Forum by user rayabram on  1-8-2004 22:37 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 * IIC Pull-up Resistor value I am using the LPC932 with 10K pull-ups on the SDA & SCL pins... The rising edge of the SCL pin takes about6uS to get all the way up !!! thus 100Kbps IIC comms is a bit marginal !! I only have a PCF8976 LCD driver on the bus Where does the data sheet recomment a pull-up value ??? is only refers to Rp !! Reply to this post  1-8-2004 22:37 Views: 2599 rayabram * RE: IIC Pull-up Resistor value Try using 2K2 pullup resistors. The value depends on the capacitance on the bus, I have used 2K2 for years without any problems even when the bus has 32 devices on it and 2 meters of cable. Reply to this post  5-8-2004  7:20 Views: 2614 mikejenx Start new topic in the Serial forum Show all topics in the Serial 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