User Guide

CCS Technical Documentation System Module and User Interface
Company confidential RH-20
Issue 1 10/2003 Nokia Corporation. Page 37
Audio Control
Figure 17: Audio block diagram RH-20
Accessory identification and Power Supply
Figure 18: Accessory identification and Power supply
PA
UEM
Radio
L
R
Rin
Lin
mic3
xear
Phs
Pihf
Lout
Rout
Lout
Rout
antenna
ACI
headint
mic2
Mic
IHF-
Speaker
SPKR
Tomahawk
bottom connector
UPP
ear data
mic data
mic1
earp
earpiece
microfone
Control Bus
Vflash1
Vflash1
4.7k
100k
Vhead
HEADINT
Vflash1
MBUS
headint=
ACI
switch
ACI-line
UEM
UPP
Accessory
Regulator
2.8V/70mA
Tomahawk
Enable
VBatt
Vout
ACI
Chip
56k