Audio Audio/Voice DSP CX20805 High-Performance Low-Power Digital Audio Signal Processor The CX20805 is a 32-bit dual core Digital Signal Processor (DSP), designed using Conexant Audio Processing Engine (CAPE) cores. The CX20805 audio processor offers customers programmability and flexibility in their designs by providing a cost- effective architecture which needs high performance and low power. CX20805 is the first high performance, low-power audio DSP in the audio market that offers over 800 MIPS(1) to support computationally intensive audio processing algorithms with large on-chip memory 520KB SRAM/352KB ROM and capable of supporting all major high sampling rates through various audio interfaces to external SoCs and Analog Mixed Signal chipsets. The device also has a Conexant Audio Bus (CAB) interface which has been specially developed to handle high data rate transfer when interfacing with HD Audioor external analog codecs. There are two on-chip tri-color PWM LEDs and a PIC controller which is retaskable to support various communication protocols over 24 programmable GPIOs. The device features support for up to four digital microphone inputs, support for dual bi-directional I2S, PCM, S/PDIF transmit and receive with independent sampling rates, and a range of digital input/output channel selections for flexible routing and mixing. Different audio sampling rates ranging from 8 kHz to 96 kHz are generated directly from the master clock without the need for external PLL. The device can be controlled and configured by both read and write capability through I2C and Serial Peripheral Interface (SPI). The USB interface supports both High speed and Full speed, and is USB2.0 Audio Class compliant for both data and control. An integrated on-chip 128-bit AES decoding engine is present for copyright protection and rendering fullrate, lossless Blu-ray media content. There are six timers/counters on chip which can be used for different application based requirements. CX20805 comes bundled with advanced signal processing routines, free of royalties, for customers interested in developing their own proprietary algorithms for different applications. This package includes CAPE optimized implementations of filter banks, Equalizers, Sampling Rate Converter (SRC), a small footprint Operating System (etc.). (1) The device integrates advanced lowpower techniques, such as DC-DC converters, Power Gating, Power Retention, Low-Vdd Standby, Dynamic Voltage Scaling (DVS) and Adaptive Voltage Scaling (AVS), which employ voltage control to manage power. In addition, frequency scaling mechanisms can also be used to reduce the power consumption further. The Configuration Toolbox allows for fast configuration of the various signal processing algorithms and performance optimization. A complete evaluation kit with reference board and all the necessary technical documentation and software is available. An efficient C compiler is also available for customers interested in programming the CAPE Cores. Applications Unified Communication Peripherals Telepresence/Unified Communication Device All-in-One Speakers/Docking System LCD Display/Sound Bar Home Automation/Intercom Wi-Fi® Phone/Smart Phone Docking Systems Mobile Internet Devices, Portable Navigation Devices, Portable Media Players Multimedia IP phone Embedded applications Full-duplex Hands-free Telephony A/V receivers, DVD Receivers, Set-top Box After-market Automotive Amplifiers and Entertainment systems Bundled DSP Algorithms (Royalty Free) Fast Fourier Transforms (FFT) Finite Impulse Response (FIR) filters Infinite Impulse Response (IIR) filters 128 band Analysis and Synthesis Filterbanks Dual Knee Dynamic Range Compression (DRC) Automatic Gain Control (AGC) Sampling Rate Converter (SRC & ASRC) Equalizer (EQ) with flexible number of bands Downmixer (Flexible number of channels) Amplifier and Mixer (Side Tone Generation) Signal generator Cyclical Buffering Mechanisms Samples are available in a small footprint 9x9, 116-pin Dual Row QFN packaging along with Evaluation kits. Conexant rates its DSPs based on the chips using standard voltage with 10 percent margin. DSP cores are often rated at the typical conditions with overvoltage and no margin. Under these conditions, CX20805 could easily exceed 1000 MIPS. Part Number CX20805 Description High-Performance LowPower Digital Audio Signal Processor Peripherals (continued) CX20805 Features DSP Dual core 32-bit DSP running at 200 MHz, which yields 800 MIPS DSP has separate X and Y data and P code memory Fixed point DSP, with floating point assist Each core is dual MAC and dual memory access. Each MAC supports 32x24-bit multiplication and 64-bit accumulators. On Chip Memory Large embedded memory 520KB SRAM and 352KB ROM. Separate X and Y data and P code memory spaces. Peripherals High Speed USB2.0 Device, supporting up to eight endpoints Quad Digital microphone PDM interface SPDIF Transmitter and SPDIF receiver Full duplex stereo I2S/PCM Custom Conexant Audio Bus (CAB) to connect to multi-channel Conexant audio devices Software PMC DCDC PLLs Six 32-bit timers/counters Serial peripheral interface (SPI) Master and Slave Inter-Integrated Circuit (I2C) Master and Slave 1 UART Serial interface Dedicated peripheral and memory-to-memory DMAs channels Interrupt controller 24 Flexible I/Os (FlexIO) fully programmable through integrated PIC processor 2 sets of 3 LED PWM drivers 6 dedicated general-purpose I/Os (GPIOs), Dedicated AES128 decryption engine. Debug/JTAG interface and On chip logic analyzer On-chip programmable PLLs Advanced power management Small footprint Real time Operating System Configuration Toolbox Details of DSP algorithms coming soon D MAs Tim e rs C o n e xa n t A u d io B u s P IC, G P IO, PWM OC LA USB2.0 HS 32-Bit DSP 0 (CAPE 0) X Y P 32-Bit DSP 1 (CAPE 1) X Y S P I M a ste r P I2S/PCM I2C Master P S R A M/ROM B rid g e U AR T S P D IF TX X S R A M/ROM S P D IF R X I2C/SPI Slave Y S R A M/ROM Quad Dig. Mic/ PDM JTA G AES Decryptor Block Diagram © 2011 Conexant Systems, Inc. All Rights Reserved. Conexant and the Conexant logo are registered trademarks of Conexant Systems, Inc. All other trademarks are owned by their respective owners. Although Conexant strives for accuracy in all its publications, this material may contain errors or omissions and is subject to change without notice. THIS MATERIAL IS PROVIDED AS IS AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING MERCHANT ABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. Conexant shall not be liable for any special, indirect, incidental or consequential damages as a result of its use. www.conexant.com General Information: U.S. and Canada: (888) 855-4562 International: 1+ (949) 483-3000 Headquarters 4000 MacArthur Blvd. Newport Beach, CA 92660 Doc# PBR-202940 Distributor/Representative Information