User Guide

Nokia Customer Care System Module
Company Confidential RH-21
Issue 2 07/2004  2004 Nokia Corporation. Page 35
6 HOOKINT Sys Con UEM Out Ana
/Dig
0...2.7 V DC HS Button interrupt, Exter-
nal Audio Accessory Detect
(EAD)
7 Not used
8 Not used
9 Not used
System Connector HP Internal microphone IF between system connector and Mic/Ear circuitry
XMICP HS/HF
Mic
Audio-
UEM
In
Out
Ana
Bias
100mV nom
diff
2.1V bias
1kohm
Audio
DC bias
Differential symmetric
input.
Accessory detection by bias
loading (EAD channel of
slow ADC of UEM)
Hook interrupt by heavy
bias loading
XMICN In Ana 100mV nom
diff ; 2.1V
bias 1k ohm
Audio
XEARP HS/HF
EAR/
Amp.
Audio -
UEM
In Ana 100 mV nom
diff
Audio Quasi differential DC-cou-
pled earpiece/HF amplifier
signal to accessory. DC
biased to 0.8V; XEARN a
quiet reference although
have signal when loaded
due to internal series resis-
tor.
XEARN
RIP
Signal
name
Connected
from - to
Display
I/O
Signal Properties
A/D Levels-Freq./
Timing resolution
Description / Notes
LCDUI(2:0) Display & UI Serial Interface
0 LCDCAMCLK UPP Displ In Dig 0/1.8V 1 MHz Clock to LCD
1LCD-
CAMTXD
UPP Displ In/
Out
Dig 0/1.8V 1 MHz Data to/from LCD
2 LCDCSX UPP Displ In Dig 0/1.8V LCD Chip Select
GENIO(28:0) General I/O Pins
4 LCDRstX UPP Displ Out Dig 0/1.8V Out / 0 Display Reset, 0-active
RIP
Signal
name
Connected
from - to
AUDIO
I/O
Signal Properties
A/D Levels-Freq./
Timing resolution
Description / Notes