GENERAL DESCRIPTION
It allows playback and recording in CD quality. It only consumes 20mW in playback mode. Further the device offers advanced power management functions. All necessary ICs and peripherals in a Digital Audio Player with flash or harddisk memory are supplied by the AS3517. The power management block generates 11 different supply voltages out of the battery supply. CPU, NAND flash, SRAM, memory cards, harddisk, LCD backlight, USB-HOST and USB-OTG can be powered. The different supply voltages are programmable via the serial control interface. AS3517 also contains a charger. The supply voltage can range from 3.0V to 5.5V. The AS3517 has an on-chip, phase locked loop (PLL) controlled, clock generator. It generates 44.1kHz, 48kHz and other sample rates defined in MP3, AAC, WMA, OGG VORBIS etc. No additional external crystal or PLL is needed in slave mode. Further the AS3517 has an independent 32kHz real time clock (RTC) on chip which allows a complete power down of the system CPU.
AMSCO
