User Guide

EM ASIC BETTY N2300
The EM ASIC (N2300) includes the following functional blocks:
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Core supply generation
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Charge control circuitry
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Level shifter and regulator for USB/FBUS
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Current gauge for battery current measuring
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LED control for display backlighting
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Digital interface (CBUS)
EM ASIC VILMA N2200
The EM ASIC (N2200) includes the following functional blocks:
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Start up logic and reset control
•
Charger detection
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Battery voltage monitoring
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32.768kHz clock with external crystal
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Real time clock with external backup battery
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SIM card interface
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Stereo audio codecs and amplifiers
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A/D converter
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Regulators
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Vibra interface
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Digital interface (CBUS)
EMC ASIP (Appcation Specified Integrated Passive) have been integrated inside the ASIC. It includes biasing
passives for microphone , EMC filter for SIM, microphones etc.
Device memories
Combo memory
The memory of the device consists of stacked DDR SDRAM and MuxedMassMemory (M3). Combo memory DDR/
M3 memory has 768Mb DDR + 2Gb M3.
Audio concept
Audio HW architecture
The functional core of the audio hardware is built around three ASICs: RAPIDOYAWE engine ASIC, mixed signal
ASIC Avilma and D/A converter DAC33.
DAC33 converts digital audio signal to analog and is routed to the FM Transmitter and amplifier TPA6130
which provides an interface for the transducers and the accessory connector.
AVilma provides analog signal for earpiece and handsfree speaker.
There are three audio transducers:
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5 x 11 mm dynamic earpiece
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11 x 15 mm dynamic speaker
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Digital MEMS (microelectromechanical systems) microphone
RM-465
System Module and User Interface
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