HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Comment
Jon Titus
User Rank
Blogger
Re: Part V: Tricks With PIC: Using the Trusty PIC Microcontroller
Jon Titus   1/20/2012 5:04:17 PM
NO RATINGS
Q: How to choose the I/O pins for self diagnose routines, such as JTAG interface? What's the software tools for micro-controller to browse through stack info? again what pins are involved?

 

A:  The MCU manufacturers designate pins for the JTAG connections, but often they share functions with other devices, such as general-purpose I/O, analog-to-digital converter input, and so on.  So, you might not have the pins available for JTAG in a real design.  While using a development board or prototype, you want those pins free for the JTAG connections.  For self diagnostics you use the MCU to check its connections, write a test message on any attached display, let someone test a keypad, and so on.  There's more to it, of course, but the idea is to ensure the MCU and the attached devices operate properly before you go into the actual application code.



Partner Zone
Latest Analysis
An in-depth survey of 700 current and future users of 3D printing holds few surprises, but results emphasize some major trends already in progress. Two standouts are the big growth in end-use parts and metal additive manufacturing (AM) most respondents expect.
Technology and global expansion are playing key roles in making manufacturing an attractive field for women to join, more than ever before, said the president of a woman-owned family of companies.
A few years ago, reshoring roared onto the scene as the next great movement in manufacturing, but the data so far reflect otherwise.
In another sign that self-driving cars are on the distant horizon, Ford has been granted a patent for an “autonomous vehicle with reconfigurable seats.”
The highest paying bachelor's degrees -- both in starting salaries and mid-career incomes -- are mostly engineering and entirely STEM disciplines.
More:Blogs|News
Design News Webinar Series
8/13/2015 11:00 a.m. California / 2:00 p.m. New York
6/25/2015 11:00 a.m. California / 2:00 p.m. New York
6/24/2015 11:00 a.m. California / 2:00 p.m. New York
6/11/2015 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Aug 31 - Sep4, Embedded System Design Techniques™ - Writing Portable and Robust Firmware in C
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2015 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service