SAA7804 Datasheet | NXP Semiconductors

.. One chip CD audio device Rev. 02 - 13 June 2005 Product data sheet 1. General description The SAA7804, is a single chip solution CD audio decoder, digital servo, audio DAC, pre-amp, laser driver and integrated ARM7TDMI-S microprocessor, targeted at a range of CD applications. The channel decoder design is derived from the SAA7817 DVD decoder IC, with optimization and design improvements specifically for CD audio (e.g. improved CD playability). The digital servo, analog pre-amp, laser driver and audio DAC blocks are improved designs based on the SAA7824 CD decoder IC. Further architectural enhancements to the design have been made to integrate system functionality and reduce the system cost of ownership. The SAA7804 IC supports a generic architecture that will form the basis of future variants in the SAA7804 IC family optimized for different CD applications. 2. Features 2.1 Hardware Features s Channel decoder based on SAA7817 IC design s Digital servo based on SAA7824 IC design s 32-bit embedded ARM7 RISC microprocessor supporting both 32-bit and 16-bit Thumb instruction sets s Mask programmed internal program ROM for microprocessor s Register structure redesigned to utilize the plete 32-bit bandwidth of the integrated microprocessor bus architecture s Programmable clock frequency for ARM microprocessor - allowing users to trade-off power consumption and processing power depending on requirements s Microprocessor access to digital representations of the diode input signals from the optical pick up; the microprocessor can also generate the servo output signals RA, FO, SL and allows the possibility of additional servo algorithms or a plete servo implementation in software s Microprocessor access to audio streams; both from the internal CD decoder and an external stereo auxiliary input (e.g. an analog source from a tuner; converted to digital via on-chip ADCs) to allow audio processing algorithms in the ARM microprocessor; e.g. bass...