Справочник Пользователя для Sagem Wireless 95MASV3C
Ref : SCT TMO MOD SPEC 662
Rev.:
Rev.:
B
Ref. sec. :
Date:
18/11/2004
Document
. All rights of reproduction and disclosure reserved.
MO2XX module – Confidential under NDA
Page 13/67
3.2 AUDIO
The module supports the following voice codecs:
•
Half-Rate
•
Full-Rate
•
Enhanced Full Rate
•
Adaptive Multi Rate
It manages an external handset microphone (MICIP/MICIN) and an external handset earphone (32 Ohms
HPP32/HPN32 and 6 to 8 Ohms HPP8/HPN8) in differential mode.
The bias voltage of the microphone is provided directly on MICIP/MICIN pins.
There are two options for the earphone:
- Two earphones, one 32 Ohms as earpiece and one 6 Ohms minimum as Ring/melody and as hands-free
loudspeaker if it is far from the microphone.
- one 32 Ohms earphone as earpiece.
The module can also manage accessories (earphone and microphone) through dedicated lines
(HSMICIP/HSMICIN for microphone and HSOL/HSOR for stereo earphone). The typical impedance for the
earphone is 150 Ohms.
Figure 3
Audio
This interface includes main protections.
To ensure proper operation of such sensitive signals, there have to be isolated from the other by ground on mother
board layout.
NB: To avoid destruction of module components, the HP inductance has to be 47nH +/- 5% @ 200MHz
Base-band
Ampli+Filter
MICIP
MICIN
HSMICIP
P
HSMICIN
HPP32
HPN32
HSOR
HSOL
HPP8
HPN8