Instruction Manual


Réf. : SCT TMO MASV3 SPEC
30
Rev. : H
Réf. sec. : 2x xxx xxx – x
Date : 12/05/04
DRAFT
Document
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. All rights of reproduction and disclosure reserved.
Page 12
This document contains information on a product under development. SAGEM reserves the right to change or discontinue this product
without notice.
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The module supports the following voice codecs:
•
Half-Rate
•
Full-Rate
•
Enhanced Full Rate
It manages an external handset microphone (MICIP/MICIN) and an external handset earphone (32 ohms
HPP32/HPN32 and 6 ohms HPP8/HPN8) in differential mode.
The bias voltage of the microphone is provided directly on MICIP/MICIN pins (1.5V).
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/HSGND/HSOR for stereo earphone). The typical impedance
for the earphone is 150ohms.
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This interface includes main protections.
To ensure proper operation of such sensitive signals, they 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
HSMI
CIP
P
HSMICIN
HPP32
HPN32
HSGND
HSOR
HSOL
HPP8
HPN8