Electrical Interface Between Baseband and Vibra
Introduction
The D2800 JUNO (BCM21351) BB ASIC has an integrated Vibra driver.
Vibra outputs will swing approximately 3V peak-to-peak.
D2800 Baseband ASIC (BCM21351) Vibra Interface Pins
Vibra
Pin Name Pin I/O Type Description
VBRAMPL
P400P
AC12 O Analo
g
Vibra positive output
VBRAMPL
P400M
AC13 O Analo
g
Vibra negative output
Figure 50 D2800 baseband ASIC (BCM21351) vibra interface pins
Audio Concept
Audio Concept
The core audio hardware is integrated in the D2800 ASIC (JUNO). The D2800 provides the interfaces to all of
the audio transducers and additionally includes the output to the Vibra motor. The headset stereo output is
driven by an audio amplifier (N2000) and the IHF speaker is driven by D-class audio amplifiers (N2801).
There are 4 audio transducers:
•
Microphone (Internal)
•
3.5mm jack for an Auxiliary Microphone (External) or Headset
•
1 Earpiece
•
1 IHF (Internal Hands Free) speaker
The platform supports the following audio applications:
•
Voice Telephony
•
Voice Recording
•
FM Radio Reception
RM-497
System Module
Issue 1 COMPANY CONFIDENTIAL Page 5 – 37
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