Table of Contents
Advertisement
RM-82
System module
Nokia Customer Care
• LED display, 3 pcs (controlled by DLIGHT)
• Main keypad on PWB, 2 pcs (controlled by KLIGHT)
• Top keypad on UI board, 2 pcs (controlled by GPIO35)
All three sets share the same driver. None of the keypads can be illuminated without the LCD backlight being
turned on.
Figure 129 Display and keypad backlight, block diagram
Slide switch
This is a slide phone that wakes up when it slides open. A switch detects the position of the slide. It is
implemented with a Hall IC and a magnet.
The signal from the Hall IC is connected to the HEADINT, that is an interrupt input. The Hall solution requires
a magnet, which is placed on top of the Hall IC, and is moved away from the sensor with the moving
mechanics, making a change of the magnetic field.
The output from the Hall IC is high (2.78 V) when the slide is open.
Audio concept
The audio concept includes an earpiece, a microphone, and a PopPort connector for headset and integrated
handsfree (IHF). Audio is based on Tiku, UEMEK and a discrete amplifier for the handsfree speaker, the boomer.
Issue 1
COMPANY CONFIDENTIAL
Page 9 –15
Copyright © 2005 Nokia. All rights reserved.
- Quick Links:
- Phone Features
Hide quick links:
Advertisement
Chapters
Table of Contents
Troubleshooting
