HW-SPAR3E-SK-UK-G Xilinx Inc, HW-SPAR3E-SK-UK-G Datasheet - Page 16

• Manufacturer Part Number: HW-SPAR3E-SK-UK-G
• Description: KIT STARTER SPARTAN-3E
• Manufacturer: Xilinx Inc

Specifications of HW-SPAR3E-SK-UK-G

• Tool / Board Applications: General Purpose MCU, MPU, DSP, DSC
• Development Tool Type: Hardware / Software - Starter Kit
• Mcu Supported Families: Spartan-3E
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: HW-SPAR3E-SK-US-UK-G; HW-SPAR3E-SK-US-UK-G

Chapter 2: Switches, Buttons, and Knob
Push-Button Switches
16
Locations and Labels
Operation
The Spartan-3E FPGA Starter Kit board has four momentary-contact push-button
switches, shown in
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
associated UCF appears in
Pressing a push button connects the associated FPGA pin to 3.3V, as shown in
Use an internal pull-down resistor within the FPGA pin to generate a logic Low when the
button is not pressed.
UCF. There is no active debouncing circuitry on the push button.
BTN_WEST
Notes:
1. All BTN_* push-button inputs require an internal pull-down resistor.
2. BTN_SOUTH is also used as a soft reset in some FPGA applications.
Figure 2-3: Four Push-Button Switches Surround Rotary Push-Button Switch
(D18)
NET
NET
NET
NET
"SW<0>"
"SW<1>"
"SW<2>"
"SW<3>"
LOC
LOC
LOC
LOC
Figure 2-2: UCF Constraints for Slide Switches
Figure
Figure 2-5
= "L13" |
= "L14" |
= "H18" |
= "N17" |
www.xilinx.com
2-3. The push buttons are located in the lower left corner of the
Figure
BTN_NORTH
BTN_SOUTH
shows how to specify a pull-down resistor within the
2-5.
(K17)
(V4)
IOSTANDARD
IOSTANDARD
IOSTANDARD
IOSTANDARD
Spartan-3E FPGA Starter Kit Board User Guide
ROT_CENTER: (V16)
= LVTTL |
= LVTTL |
= LVTTL |
= LVTTL |
ROT_B: (G18)
ROT_A: (K18)
Rotary Push Button Switch
BTN_EAST
(H13)
UG230 (v1.2) January 20, 2011
PULLUP
PULLUP
PULLUP
PULLUP
Requires an internal pull-up
Requires an internal pull-up
Requires an internal pull-down
Figure 2-3
;
;
;
;
UG230_c2_02_021206
Figure
and the
2-4.
R