Chapter 1: SP605 Evaluation Board

User Pushbutton Switches

The SP605 provides five active-High pushbutton switches: SW4, SW5, SW6, SW7 and SW8. The five pushbuttons all have the same topology as the sample shown in Figure 1-16. Four pushbuttons are assigned as GPIO, and the fifth is assigned as a CPU_RESET. Figure 1-16and Table 1-24describe the pushbutton switches.

VCC1V5

CPU_RESET

1

2

Pushbutton

P1 P4

P2 P3

4

3

SW6

1R230

1.00K

1%

21/16W

UG526_16_092409

Figure 1-16:User Pushbutton Switch (Typical)

Table 1-24:Pushbutton Switch Connections

U1 FPGA Pin

Schematic Netname

Switch Pin

 

 

 

F3

GPIO_BUTTON_0

SW4.2

 

 

 

G6

GPIO_BUTTON_1

SW7.2

 

 

 

F5

GPIO_BUTTON_2

SW5.2

 

 

 

C1

GPIO_BUTTON_3

SW8.2

 

 

 

H8

CPU_RESET

SW6.2

 

 

 

42

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SP605 Hardware User Guide

 

 

UG526 (v1.1.1) February 1, 2010

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Image 42
Xilinx SP605 manual User Pushbutton Switches, SW6