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CS4610-CM 数据表(PDF) 9 Page - Cirrus Logic |
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CS4610-CM 数据表(HTML) 9 Page - Cirrus Logic |
9 / 29 page DS241PP5 9 CS4610/11 CrystalClear™ SoundFusion™ PCI Audio Accelerator OVERVIEW The CS4610 and CS4611 are high performance au- dio accelerator DSPs for the PCI bus. These devic- es, combined with application and driver software, provide a complete system solution for cost effec- tive acceleration of Windows® DirectSound, DirectSound3D, DirectInput, DirectShow, MIDI playback via Wavetable Synthesis with reverbera- tion and chorus effects processing, and more. The CS4610 is a high-performance, full-featured version of the SoundFusion audio accelerator. The CS4611 is a reduced-cost version of the CS4610. The CS4611 has a lower max clock speed and does not support AC-3 or MPEG-2. Please refer to the OEM Software Reference Manual for more details. There are three main functional blocks within the CS4610/11: the Stream Processor, the PCI Inter- face, and the DMA Engine. The Stream Processor (SP) is a high speed custom Digital Signal Proces- sor (DSP) core designed by Cirrus Logic, Inc. spe- cifically for audio signal processing. This extremely powerful DSP core is capable of running complex algorithms such as Dolby Digital AC-3 or MPEG-2 audio decoding for applications such as DVD movie playback or gaming. The SP is capable of running a number of different signal processing algorithms simultaneously. This high concurrency capability is valuable for applications such as immer- sive 3D games, which may play a number of Direct- Sound streams, a number of DirectSound3D streams, and a MIDI music sequence simultaneously. Separate RAM memories are included on-chip for the SP program code (Program RAM), parameter data (Parameter RAM), and audio sample data (Sample RAM). A small ROM memory (Coeffi- cient ROM) is included to store fixed coefficient data required for the sample rate conversion and audio decompression algorithms. The RAM-based DSP architecture of the CS4610/11 ensures maximum system flexibility. The software function/feature mix can be adapted to meet the requirements of a variety of different applications, such as DirectX™ games, DVD mov- ie playback, or DOS applications. This RAM-based architecture also provides a means for future sys- tem upgrades, allowing the addition of new or up- graded functionality through software updates. The CS4610/11 provides an extremely efficient bus mastering interface to the PCI bus. The PCI Inter- face function allows economical burst mode trans- fers of audio data between host system memory buffers and the CS4610/11 device. Program code and parameter data are also transferred to the CS4610/11 over the PCI Interface. The CS4610/11 DMA Engine provides dedicated hardware to manage transfer of up to 96 concurrent audio/data streams to and from host memory buff- ers. The DMA Engine provides hardware scatter- gather support, allowing simple buffer allocation and management. This implementation improves system efficiency by minimizing the number of host interrupts. The CS4610/11 supports a variety of audio I/O configurations, including direct connection to the CrystalClear CS423x Codecs or to an AC’97 Co- dec such as the CrystalClear CS4297. The system’s flexibility is further enhanced by the inclusion of auxiliary ADC and DAC ports, a bi-directional se- rial MIDI port, a joystick port, a hardware volume control interface, and a serial data port which al- lows connection of an optional external EEPROM device. The block diagram in Figure 6 depicts a mother- board audio subsystem based on the CS4610/11 and the CS423x. This approach features the proven ISA legacy support of the CS423x Codecs (which include the CS423xB family as well as the CS4235 and CS4239 devices). The CS423x provides DOS applications with hardware compatibility for the Sound Blaster Pro™, OPL3, and MPU-401 register sets. In this configuration, the CS423x also pro- vides the system joystick interface. The CS423x |
类似零件编号 - CS4610-CM |
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类似说明 - CS4610-CM |
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