Charge Control; Audio - Nokia 6088 Baseband Description And Troubleshooting

Nokia Customer Care

Charge Control

In active mode, charging is controlled by the PM6610's digital part. Charging voltage
and current monitoring are used to limit charging into a safe area. The PM6610 has a
MaxPower protection limit at PNP transistor to cut-off charger.
Cut Off MaxPower = 600mW
The PM6610 limits the charging voltage to MaxVoltage.
MaxVoltage= 4.25V
The PM6610 limits the total system current (the collector current of PNP transistor)
by limiting the maximum power of PNP transistor charge.

Audio

The audio control and processing is provided by the MSM which contains the audio
codec, the MCU and DSP blocks. These blocks handle and process the audio data
signals. The baseband supports 2 microphone inputs and three receiver (earpiece)/
speaker outputs.
MIC+ & MIC- are used for the mobile terminal's internal microphone. JACK_MIC+ &
JACK_MIC- are used for headsets.
The internal microphone (MIC+/-) is differential AC connection to the MSM
(MIC1P/N). The headset microphone is single-ended AC connection to the MSM
Issue 1 10/2006 © 2006 Nokia Corporation
Figure 15: Audio Sending Direction Block Diagram
Baseband Description and Troubleshooting
Company Confidential
6088 (RM218)
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