IR Hardware Info

One of the Newton 2.x OS Q&As
Copyright © 1997 Newton, Inc. All Rights Reserved. Newton, Newton Technology, Newton Works, the Newton, Inc. logo, the Newton Technology logo, the Light Bulb logo and MessagePad are trademarks of Newton, Inc. and may be registered in the U.S.A. and other countries. Windows is a registered trademark of Microsoft Corp. All other trademarks and company names are the intellectual property of their respective owners.


For the most recent version of the Q&As on the World Wide Web, check the URL: http://www.newton-inc.com/dev/techinfo/qa/qa.htm
If you've copied this file locally, click here to go to the main Newton Q&A page.
This document was exported on 7/23/97.

IR Hardware Info (9/6/94)

Q: How does the Newton send "Remote Control" codes?

A: This information is hardware dependent, and is only valid for the Original Message Pad, Message Pad 100, and Message Pad 110 products.

The IR transmitter/reciever is a Sharp IR Data Communication Unit connected to the second channel of a built-in SCC. When in "Remote Control" mode, the SCC is not used. Instead, a carrier frequency of 38KHz is transmitted, and the CPU toggles a register to generate the data pattern.