原标题：ADI ADSP-21479 SHARC处理器开发评估方案

　　ADI公司的ADSP-21478和ADSP-21479 是SHARC数字信号处理器(DSP),采用超级哈佛架构,是32位/40位浮点处理器,具有容量大的片上SRAM,多个内部总线,以及创新的数字应用接口(DAI),适合用于工业控制,仪器仪器,汽车音频,医疗电子等领域.本文介绍了ADSP-21479功能方框图, SHARC核方框图,以及评估系统ADSP-21479 EZ-KIT Lite®主要特性,评估板方框图,电路图,材料清单和PCB元件布局图.

　　The ADSP-21478 and ADSP-21479 SHARC® processors are members of the SIMD SHARC family of DSPs that feature Analog Devices’ Super Harvard Architecture. The processors are source code compatible with the ADSP-2126x, ADSP-2136x, ADSP-2137x, ADSP-2146x, and ADSP-2116x DSPs as well as with first generation ADSP-2106x SHARC processors in SISD (single-instruction, single-data) mode. These processors are

　　32-bit/40-bit floating-point processors optimized for high performance audio applications with a large on-chip SRAM, multiple internal buses to eliminate I/O bottlenecks, and an innovative digital applications interface (DAI).

　　Markets & Applications

　　Industrial Control and Instrumentation

　　Automotive Audio

　　Medical Applications

　　图1.ADSP-21479功能方框图

　　图2.ADSP-21479 SHARC核方框图

　　ADSP-21479 EZ-BoardTM评估系统ADSP-21479 EZ-KIT Lite®

　　The evaluation board is designed to be used in conjunction with the VisualDSP++® development environment to test the capabilities of the ADSP-21479 SHARC processors. The VisualDSP++ development environment aids advanced application code development and debug, such as:

　　• Create, compile, assemble, and link application programs written in C++, C, and assembly

　　• Load, run, step, halt, and set breakpoints in application programs

　　• Read and write data and program memory

　　• Read and write core and peripheral registers

　　• Plot memory

　　Access to the processor from a personal computer (PC) is achieved through a USB port or an external JTAG emulator. The USB interface of the standalone debug agent gives unrestricted access to the processor and evaluation board’s peripherals. Analog Devices JTAG emulators offer faster communication between the host PC and target hardware.

　　图3.ADSP-21479 EZ-KIT Lite评估板外形图

　　ADSP-21479 EZ-KIT Lite评估板主要特性:

　　• Analog Devices ADSP-21479 SHARC processor

　　• Core performance up to 266 MHz

　　• 196-pin BGA package

　　• 16.625 MHz CLKIN oscillator

　　• 5 Mb of internal RAM memory

　　• Parallel flash memory

　　• Numonyx M29W320EB – 4 MB (4M x 8 bits)

　　• SDRAM memory

　　• Micron MT48LC16M16A2P-6A – 16 Mbx x 16 bits (256 Mb or 32 MB)

　　• Asynchronous memory (SRAM)

　　• ISSI IS61WV102416BLL-10TLI – 1M x 16 bits (2 MB)

　　• SPI flash memory

　　• Numonyx M25P16 – 16 Mb

　　• Analog audio interface

　　• Analog Devices AD1939 audio codec

　　• 4 x 2 RCA phono jack for eight channels of stereo output

　　• 4 x 1 RCA phono jack for four channel of stereo input

　　• Two DB25 connectors for differential inputs/outputs

　　• 3.5 mm headphone jack with volume control connected to one of the stereo outputs

　　• Supports all eight DACs and four ADCs in TDM and I2S modes at 48 KHz, 96 KHz, and 192 KHz sample rates

　　• Digital audio interface (S/PDIF)

　　• RCA phono jack output

　　• RCA phono jack input

　　• Universal asynchronous receiver/transmitter (UART)

　　• ADM3202 RS-232 line driver/receiver

　　• DB9 female connector

　　• LEDs

　　• Ten LEDs: one board reset (red), eight general-purpose (amber), and one power (green)

　　• Push buttons

　　• Five push buttons: one reset, two connected to the DAI, and two connected to FLAG pins of the processor

　　• Expansion interface II

　　• Next generation of the expansion interface design, provides access to most of the processor signals

　　• Power supply

　　• 5V @ 3.6 Amps

　　• Other features

　　• Watch dog timer (WDT) system reset implementation

　　• Real-time clock (RTC)

　　• Shift register (SR)

　　• SHARC power measurement jumpers

　　• JTAG ICE 14-pin header

　　• USB cable

　　图4.ADSP-21479 EZ-KIT Lite评估板方框图

　　ADSP-21479 EZ-KIT Lite评估板材料清单: