AS3517

Technical coantmesntAsGtill valid AS3517 V17 Data Sheet, Confidential AS3517 Data Sheet, Confidential Stereo Audio Codec with enhanced System Power Management 1 General Description The AS3517 is a low power stereo audio codec and is designed for Portable Digital Audio Applications. It allows playback and recording in CD quality. It has a variety of audio inputs and outputs to directly connect electret microphones, 16Ω/32Ω headsets and auxiliary signal sources via a 10channel mixer. 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 different regulated supply voltages are programmable via the serial control interface. The power management block generates 11 different supply voltages out of a single battery supply. CPU, NAND flash, SRAM, memory cards, harddisk, LCD, LCD backlight, USB-HOST and USBOTG can be powered. AS3517 also contains a charger. The single supply voltage may vary 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. 2 Key Features Multi-bit Sigma Delta Conver...