SAA7804
Overview
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).
- 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 complete 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 complete 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. ba
