参数资料
型号: HW-SPAR3AN-SK-UNI-G
厂商: Xilinx Inc
文件页数: 79/140页
文件大小: 0K
描述: KIT STARTER SPARTAN-3 AN
产品变化通告: Adapter Replacement 23/May/2008
标准包装: 1
系列: Spartan®-3AN
类型: FPGA
适用于相关产品: Spartan-3AN XC3S700AN-FG484,XCF04S-VOG20C
所含物品: 面板、缆线、软件、数据表和用户手册
相关产品: XC3S700AN-5FGG484C-ND - IC FPGA SPARTAN-3A 700K 484-FBGA
122-1598-ND - IC FPGA SPARTAN -3AN700K 484FBGA
122-1556-ND - IC SPARTAN-3AN FPGA 700K 484FBGA
其它名称: 122-1528
HW-SPAR3AN-SK-UNI-G-PROMO
HW-SPAR3AN-SK-UNI-G-PROMO-ND
R
Chapter 10
Digital-to-Analog Converter (DAC)
The Spartan ? -3A/3AN FPGA Starter Kit board includes an SPI-compatible, four-channel,
serial Digital-to-Analog Converter (DAC). The DAC device is a Linear Technology
LTC2624 quad DAC with 12-bit unsigned resolution. The four outputs from the DAC
appear on the J21 header, which uses the Digilent six-pin Peripheral Module format. The
DAC and the header are located immediately below the Ethernet RJ-45 connector, as
shown in Figure 10-1 .
Linear Tech LTC2624 Quad DAC
SPI_MOSI: (AB14)
SPI_SCK: (AA20)
DAC_CS: (W7)
DAC_CLR: (AB13)
DAC_OUT: (V7)
6-pin DAC Header (J21)
UG334_c10_01_052407
Figure 10-1:
DAC and Associated Stake Pin Header (J21)
SPI Communication
As shown in Figure 10-2 , the FPGA uses a Serial Peripheral Interface (SPI) to communicate
digital values to each of the four DAC channels. The SPI bus is a full-duplex, synchronous,
character-oriented channel employing a simple four-wire interface. A bus master—the
FPGA in this example—drives the bus clock signal (SPI_SCK) and transmits serial data
(SPI_MOSI) to the selected bus slave—the DAC in this example. At the same time, the bus
slave provides serial data (SPI_MISO) back to the bus master.
Spartan-3A/3AN FPGA Starter Kit Board User Guide www.xilinx.com
UG334 (v1.1) June 19, 2008
79
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