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The AS3527 is an ultra low-power microcontroller based on the ARM9 32-bit
processor with fully integrated high performance audio features and system power
AS3527 is based on the ARM922TDMI processor, with 8K byte instruction, 8K
byte data cache memories and embedded 320K Byte SRAM with performance
from 20 ~ 266MHz.
The AS3527 SOC (system-on-chip) features dedicated high speed interfaces for
ATA IDE, USB2.0 HS-OTG and SDRAM ensuring maximum performance for
download, upload, and playback.
Furthermore interfaces for NAND flashes, MMC/SD cards and Memory Stick
ensure most flexible system design possibilities. Hardware support for parallel
interfaces lower the CPU load serving complex and/or color user interfaces.
Additional serial high-speed data and control interfaces guarantee the connection
to other peripherals and or processors in the system.
Two independently programmable PLLs generate the required frequencies for
audio playback/recording, for the processor core and for the USB interface at the
same time. An additional external clock input eliminates the use of external
crystals when used in multi-processor systems.
It has a variety of audio inputs and outputs to directly connect microphones, and
auxiliary signal sources via a 10-channel mixer to a headset 16Ω /32Ω or auxiliary
audio peripherals. Selectable mixer bypasses lower the power consumption for
simple playback operations and enlarger the system design flexibility.
Further the device offers advanced power management functions. All necessary
ICs and peripherals in a Digital Audio Player with flash or hard-disk memory are
supplied by the AS3527. The different regulated supply voltages are fully
programmable. The power management block generates 11 different supply
voltages out of a single supply. CPU, NAND flash, SRAM, memory cards, hard
disk, LCD, LCD backlight, USB-HOST and USB OTG can be powered.
The AS3527 has an independent 32kHz real time clock (RTC) on chip, which
allows a complete power down of the system CPU and peripherals and contains a
charger for Li-Ion batteries.
The single supply voltage may vary from 3.0V to 5.5V.
AS3527 is available in a small footprint of 13x13mm, 224 pin CTBGA RoHS-