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Copyright 2005© Siemens AG
Page 49 of 53
TD_Repair_L2.5_A70_A75_R1.0.pdf Release 1.0
10.5 IO Connector (X211) with ESD protection (Z211)
IO Connector
Pin
Name IN/OUT Notes
1 POWER I/O POWER is needed for charging batteries and for supplying
the accessories. If accessories are supplied by mobile, talk-
time and standby-time from telephone are reduced.
Therefore it has to be respected on an as low as possible
power consumption in the accessories.
2 GND
3 TX O Serial interface
4 RX I Serial interface
5 DATA/CTS I/O Data-line for accessory-bus
Use as CTS in data operation.
6 RTS I/O Use as RTS in data-operation.
7 CLK/DCD I/O Clock-line for accessory-bus.
Use as DTC in data-operation.
8 AUDIO_L Analog O driving ext. left speaker
With mono-headset Audio_L and Audio_R differential mode
9 GND
10 AUDIO_R Analog O driving ext. right speaker With mono-headset Audio_L and
Audio_R differential Signal
11 GND_MIC Analog I for ext. microphone
12 MICP2 Analog I External microphone
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