AS3525-A/-B C22O22
Data Sheet, Confidential
2.3
MS / MS Pro Interface
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Dedicated dual port buffer RAM
Display Interface
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Serial and parallel controller supported
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On chip hardware acceleration
Synchronous Serial Interface
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Master and slave operation
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8 and 16 bit support
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Several protocol standards supported
I2S Interface
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Input multiplexed with audio subsystem
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selectable SPDIF input conversion
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Dedicated dual port buffer RAM
2 Wire Serial Control Interface
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Master and slave operation
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Standard and fast mode support
General Purpose IO Interface
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4x 8-bit ports
Power Management
Voltage Generation
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step up for system supply (3.0V-3.6V, 150mA)
•
charge-pump for CPUcore (1.05V-1.2V, 50mA)
•
charge pump for USB OTG (5V, 10mA)
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LDO for digital supply (2.9V, 200mA)
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LDO for analog supply (2.9V, 200mA)
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LDO for IO supply (2.94 or 3.11V, 200mA)
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LDO for peripherals (1.7V-3.3V, 200mA)
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LDO for USB Transceiver (3.26V, 200mA)
•
LDO for RTC (1.0V-2.5V, 2mA)
15V Back-light step up converter
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for driving up to 6 white LEDs in series to achieve a
uniform illumination
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current programmable up to 40mA (1.25mA steps)
Li-Io Battery Charger
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•
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automatic 50mA trickle charging
prog. constant current charging (50 – 400mA)
prog. constant voltage charging (3.9 - 4.25V)
2.4
RTC
System
2.2
Audio
Multi-bit Sigma Delta Converters
•
DAC: 18bit with 94dB SNR (‘A’ weighted)
•
ADC: 14bit with 82dB SNR (‘A’ weighted)
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Sampling Frequency: 8-48kHz
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32 gain steps @ 1.5dB and MUTE
2 Line Inputs
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stereo, 2x mono or mono differential inputs
•
32 gain steps @ 1.5dB and MUTE
2 Microphone Inputs
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differential inputs
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3 gain pre-sets (28/34/40 dB) and OFF with AGC
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32 gain steps @ 1.5dB and MUTE
•
microphone detection with about 50uA
•
supply for electret microphone max 1mA
•
remote control by switch
Line Output
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max 1Vp @ 10kΩ in single ended stereo mode
•
>32Ω in mono differential mode to drive ear-pieces
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32 gain steps @ 1.5dB and MUTE
Stereo Headphone Audio Amplifier
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2x 60mW @ 16Ω driver capacity
•
32 gain steps @ 1.5dB and MUTE
•
Click- and pop-less start-up and power down
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Headphone and over-current detection
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Phantom ground eliminates large capacitors
Stereo Speaker Audio Amplifier
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2x 500mW @ 4Ω driver capacity
•
32 gain steps @ 1.5dB and MUTE
•
Click- and pop-less start-up and power down
•
Over-current detection
10 Channel Audio Mixer
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•
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mixes Line inputs, Mic inputs and DAC output
separate selectable source for right and left channel
possibility to select AGC to prevent clipping
•
ultra low power 32kHz oscillator
•
32bit RTC second counter
•
selectable alarm (seconds or minutes)
•
trim able oscillator
Oscillator
•
low power 12-24MHz Oscillator
•
generating main system clock
Supervisor
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automatic battery monitoring with interrupt generation
and selectable warning level
•
automatic temperature supervision with interrupt
generation and selectable warning and shutdown
levels
General Purpose ADC
•
10bit resolution
•
16 inputs analog multiplexer
UID
•
Unique Identification Number in OTP ROM for DRM
support
General
•
Reset pin, watchdog
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10sec emergency shut-down
•
Wide battery supply range 1V – 5.5V
•
MP3 playback with 58mW
Packages:
•
•
AS3525-A: CTBGA224 13x13mm, 0.8mm pitch
AS3525-B: CTBGA144 10x10mm, 0.8mm pitch
3
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Application
Portable Digital Audio Player and Recorder
Portable Digital Media Player
PDA
Smartphone
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www.austriamicrosystems.com
Revision 1.13
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