V1.20 Page 41 of 48 ICM MP CCQ GRM
A55/C55_Hitachi Company Confidential © Copyright Siemens AG 04/03
7.3 Microphone
Pin Name IN/OUT Remarks
1 MICP1 O Microphone power supply. The same line
carries the low frequency speech signal.
2 MICN1 I Speech signal. The same line carries the
microphone power supply.
3 GND_MIC
7.4 Battery
Pin Name Level Remarks
1 GND - Ground
2 AKKU_TYP 0V...2.65V Recognition of battery/supplier
3 BATT+ 3 V... 4.5V Positive battery pole
XG242
XG181
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