User Guide

RH-30/RH-31 Company Confidential
System Module Nokia Customer Care
Page 38 © 2004 Nokia Corporation. Issue 2 11/2004
Audio control
Figure 17: Audio block diagram RH-30/RH-31
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