External Earpiece; Vibra Circuitry - Nokia n80 User Manual

RM-91; RM-92
Nokia Customer Care System Module

External earpiece

All galvanic accessories are connected to the system connector.
The accessory audio mode is automatically enabled/disabled during connection/disconnection of dedicated
phone accessories.
The EM ASIC (N2200) provides two output channels in either single-ended or differential format. N2200
outputs XearL and XearLC form the left channel audio output, and XearR and XearRC the right channel audio
output. XearLC and XearRC are the ground pins if the output works in a single-ended operation.
In the system connector side, HSEAR P and HSEAR N form the left channel output, and HSEAR R P and HSEAR
R N the right channel output. Respectively, HSEAR N and HSEAR R N are the ground pins if the output works
in a single-ended operation.
Figure 103 External earpiece circuitry (system connector connected on the right)

Vibra circuitry

Vibra is used for vibra-alarm function.
The vibra motor is connected to the EM ASIC (N2200) VibraP and VibraN Pulse Width Modulated (PWM) outputs.
Figure 104 Vibra circuitry
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