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Gemalto M2M GmbH MC75 Manuale Utente

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MC75 Hardware Interface Description 
Strictly confidential / Draft 
s
 
MC75_V00.190a 
Page 71 of 91 
15.02.2005 
Function 
Signal name 
IO 
Signal form and level 
Comment 
VMIC O 
V
O
min = 2.4V 
V
O
typ = 2.5V 
V
O
max = 2.6V 
I
max
 = 2mA 
Microphone supply for 
customer feeding circuits 
EPP2 O 
EPN2 O 
1.0954Vpp (differential) typical 
3.4Vpp differential maximal 
Audio mode TBD 
Measurement conditions TBD 
Minimum differential resp. single 
ended load 27 Ohms
 
The audio output can directly 
operate a 32-Ohm-
loudspeaker. 
If unused keep pins open. 
EPP1 O 
EPN1 O 
1.0954Vpp (differential) typical 
6.0 Vp-p differential maximal  
Audio mode TBD 
Measurement conditions TBD 
Minimum differential resp. single 
ended load 7.5 Ohms
 
The audio output can directly 
operate an 8-Ohm-
loudspeaker. 
If unused keep pins open. 
MICP1 I 
MICN1 I 
MICP2 I 
MICN2 I 
Full Scale Input Voltage  1.578 Vpp 
0dBm0 Input Voltage 
1.0954 Vpp 
At MICNx, apply external bias from 1.0V to 
1.6V. 
Audio mode TBD 
Measurement conditions TBD 
Balanced or single ended 
microphone or line inputs with 
external feeding circuit (using 
VMIC and AGND). 
If unused keep pins open. 
Analog 
Audio 
interface 
AGND 
 
Analog Ground 
GND level for external audio 
circuits