AS3527

The AS3527 is an ultra low-power microcontroller based on the ARM9 32bit processor with fully integrated high performance audio features and system power management features.

Using advanced 0.13m process technology of AS3527 and a large on chip RAM leads to outstanding low power consumption of as low as 52mW for a complete flash-player during a typical audio SW playback.

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-a-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 of AS3527 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.

AS3527 has a variety of audio inputs and outputs to directly connect microphones, and auxiliary signal sources via a 10-channel mixer to a headset 16 Ohm/32 Ohm or auxiliary audio peripherals. Selectable mixer bypasses lower the power consumption for simple playback operations and enlarger the system design flexibility.

Further AS3527 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 of AS3527 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 of AS3527 may vary from 3.0V to 5.5V.

AS3527 is available in a small footprint of 13x13mm, 224 pin CTBGA RoHS-compliant package.