参数资料
型号: HW-SPAR3AN-SK-UNI-G
厂商: Xilinx Inc
文件页数: 27/140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
Push-Button Switches
Push-Button Switches
Locations and Labels
The Spartan-3A/3AN Starter Kit board has four momentary-contact push-button
switches, shown in Figure 2-5 . The push buttons are located in the lower right corner of the
board and are labeled BTN_NORTH, BTN_EAST, BTN_SOUTH, and BTN_WEST. The
FPGA pins that connect to the push buttons appear in parentheses in Figure 2-5 , and the
associated UCF is listed in Figure 2-7 .
Rotary Push Button Switch
ROT_A: (T13)
Requires an internal pull-up
BTN_NORTH
(T14)
ROT_B: (R14)
ROT_CENTER: (R13)
Requires an internal pull-up
Requires an internal pull-down
BTN_WEST
(U15)
BTN_SOUTH
BTN_EAST
(T16)
(T15)
UG334_c2_05_052407
Notes:
1. All BTN_* push-button inputs require an internal pull-down resistor.
Figure 2-5: Four Push-Button Switches Surround the Rotary Push-Button Switch
Operation
Pressing a push button connects the associated FPGA pin to 3.3V, as shown in Figure 2-6 .
Use an internal pull-down resistor within the FPGA pin to generate a logic Low when the
button is not pressed. Figure 2-7 shows how to specify a pull-down resistor within the
UCF. There is no active debouncing circuitry on the push button.
3.3V
Push Button
FPGA I/O Pin
BTN_* Signal
UG230_c2_03_021206
Figure 2-6: Push-Button Switches Require an Internal Pull-Down Resistor in the
FPGA Input Pin
Spartan-3A/3AN FPGA Starter Kit Board User Guide www.xilinx.com
UG334 (v1.1) June 19, 2008
27
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