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CS48560-DQZ Datasheet(PDF) 7 Page - Cirrus Logic |
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CS48560-DQZ Datasheet(HTML) 7 Page - Cirrus Logic |
7 / 26 page CS485xx Family Data Sheet 32-bit Audio Decoder DSP Family DS734F3 Copyright 2009 Cirrus Logic, Inc. 7 CONFIDENTIAL 4. Hardware Functional Description 4.1 DSP Core The CS485xx family DSPs are single-core DSP with separate X and Y data and P code memory spaces. The DSP core is a high-performance, 32-bit, user-programmable, fixed-point DSP that is capable of performing two multiply-and-accumulate (MAC) operations per clock cycle. The DSP core has eight 72-bit accumulators, four X- and four Y-data registers, and 12 index registers. The DSP core is coupled to a flexible DMA engine. The DMA engine can move data between peripherals such as the serial control port (SCP), digital audio input (DAI) and digital audio output (DAO), or any DSP core memory, all without the intervention of the DSP. The DMA engine off loads data move instructions from the DSP core, leaving more MIPS available for signal processing instructions. CS485xx family functionality is controlled by application codes that are stored in on-board ROM or downloaded to the CS485xx from a host controller or external serial FLASH/EEPROM. Users can develop their applications using DSP Composer to create the processing chain and then compile the image into a series of commands that are sent to the CS485xx through the SCP. The processing application can either load modules (matrix-processors, virtualizers, post-processors) from the DSPs on-board ROM, or custom firmware can be downloaded through the SCP. The CS485xx is suitable for a variety of audio post-processing applications such as automotive head-ends, automotive amplifiers, and boom boxes. 4.1.1 DSP Memory The DSP core has its own on-chip data and program RAM and ROM and does not require external memory for post-processing applications. The Y-RAM and P-RAM share a single block of memory that can be configured to make Y and P equal in size, or more memory can be allocated for Y-RAM in 2kword blocks. Table 2. Device and Firmware Selection Guide Device Suggested Application Channel Count Input/Output Package CS48520-CQZ Digital TV Portable Audio Docking Station Portable DVD DVD Mini / Receiver Multimedia PC Speakers Up to 4 channel in / 4 channel out 48-pin QFP CS48540-CQZ CS48540-DQZ CS48520 features Plus 8 Channel Car Audio DVD Receiver Up to 8 channel in / 8 channel out 48-pin QFP CS48560-CQZ CS48560-DQZ CS48540 features Plus 12 channel Car Audio High-end Digital TV Dual Source/Dual Zone SACD Up to 12 channel in /12 channel out 48-pin QFP |
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