Pop-Porttm Connector - Nokia RM-42 Service Manual

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Figure 116 External earpiece circuitry (Pop-Port connected on the right)
TM
Pop-port connector
TM
Pop-Port connector provides a fully differential 4–wire stereo line-level output connection and fully
differential 2-wire mono line-level or microphone level input connection.
The handsfree driver in Retu is meant for the headset.
The output is driven in a fully differential mode. In the fully differential mode, the handsfree pin is the negative
output and the HFCM pin is the positive output. The gain of the handsfree driver in the differential mode is 6 dB.
The earpiece and headset signals are multiplexed so that the outputs cannot be used simultaneously.
Pin #/ Signal Signal
name description
1/ Charge V Charge
2/ GND Charge GND
Page 9–30
Figure 117 External audio connector
Table 18 Audio connector pin assignments
Spectral range
DC
-
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Voltage/ Max or nominal
Current levels serial
impedance
0-9V/ 0.85A
0.85A 100mΩ (PWB+
conn.)
RM-42
System Module
Notes
9241872 (Issue 1)