Push-Button Switches With Selectable Jumpers For I/O Pins - Atmel ATF15 DK3-U Series User Manual

Push-button Switches with Selectable Jumpers for I/O Pins

The CPLD Development/Programmer Board contains eight push-button switches, which are
connected to the I/O pins of the CPLD. The switches send input logic signals to the user I/O pins of the
ATF15xx device. These switches are labeled SW1 to SW8 on the CPLD Development/Programmer
Board. One end of each input push-button switch is connected to V
push-button switch is connected to a pull-down resistor and then connected to the specific I/O pin of
the CPLD through the JPS1/2/3/4/5/6/7/8 selectable jumper.
If any one of these switches is pressed and the corresponding jumper is set, the specific I/O pin of the
device will be driven to a logic high state by the output of switch circuit. Since each push-button switch
is also connected to a pull-down resistor, the input will have a logic low state if the switch is not pressed
with the corresponding jumper set. If the push-button jumper is not set, the corresponding pin will be
treated as an unconnected pin.
jumper.
different package types.
Figure 4.
SW1
VCCIO
Table 4.
44-pin TQFP
Push Button PLD Pin
SW1
SW2
SW3
SW4
SW5
SW6
SW7
SW8
8 ATF15xx-DK3-U Development/Programmer Kit [USER GUIDE]
Atmel-8961A-CPLD-ATF15xx-DK3-U-Development-Kit-UserGuide_072015
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Figure 4
Table 4 shows the connections of these eight push-button switches to the CPLD I/O pins in the
Circuit Diagram of the Push-button Switches and Jumpers for the I/O Pins
R19
1K
JPS1 R29
SIP2 1K
C13
0.001uF
ATF15xx Connections to the I/O Pin Switches
44-pin PLCC
Push Button PLD Pin
15 SW1
14 SW2
13 SW3
12 SW4
8 SW5
5 SW6
2 SW7
44 SW8
is a circuit diagram of the push-button switch and selectable
SW1
84-pin PLCC
Push Button PLD Pin
21 SW1
20 SW2
19 SW3
18 SW4
14 SW5
11 SW6
8 SW7
6 SW8
IO, while the other end of each
CC
100-pin TQFP
Push Button PLD Pin
54 SW1
51 SW2
49 SW3
44 SW4
9 SW5
6 SW6
4 SW7
80 SW8
48
36
44
37
96
98
84
99