Leds With Selectable Jumpers - Atmel ATF15 DK3-U Series User Manual

LEDs with Selectable Jumpers

The CPLD Development/Programmer Board has eight individual LEDs, which allow designers to
display the output signals from the user I/Os of the ATF15xx devices. These eight LEDs are labeled
LED1 to LED8 on the CPLD Development/Programmer Board. The cathode of each LED is connected
to Ground (GND) through a series resistor, while the anode of each LED is connected to a user I/O pin
of the CPLD through the JPL1/2/3/4/5/6/7/8 selectable jumper. These jumpers can be removed to
disable the LEDs by unconnecting the anodes of the LEDs to the I/O pins of the CPLD. The figure
below illustrates the circuit diagram of the LEDs with the selection jumpers.
To turn on a particular LED, the corresponding ATF15xx I/O pin connected to the LED must be in a
logic high state with the corresponding jumper set; therefore, the outputs of the ATF15xx device will
need to be configured as active high outputs. The LEDs work best at 2.5V V
The lower pin count devices (44-pin) only have four I/Os connected to LED1/2/3/4. For the higher
pin-count devices (100-pin and larger), all eight LEDs are connected to the I/Os of the device.
shows the different package connections of the CPLD I/Os to the LEDs.
Figure 3.
RL1
330
LED1
GREEN
JPL1
SIP2
Table 3.
44-pin TQFP
LED
LED1
LED2
LED3
LED4
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Circuit Diagram of the LEDs and Jumpers
RL2 RL3 RL4
330 330 330
LED2 LED3 LED4
GREEN GREEN GREEN
JPL2 JPL3 JPL4
SIP2 SIP2 SIP2
ATF15xx Connections to LEDs
44-pin PLCC
PLD Pin LED
28 LED1
25 LED2
22 LED3
19 LED4
ATF15xx-DK3-U Development/Programmer Kit [USER GUIDE]
RL5 RL6
330 330
LED5 LED6
GREEN GREEN
JPL5 JPL6
SIP2 SIP2
84-pin PLCC
PLD Pin LED
34 LED1
31 LED2
28 LED3
25 LED4
LED5
LED6
LED7
LED8
Atmel-8961A-CPLD-ATF15xx-DK3-U-Development-Kit-UserGuide_072015
IO or higher.
CC
RL7 RL8
330 330
LED7 LED8
GREEN GREEN
JPL7 JPL8
SIP2 SIP2
100-pin TQFP
PLD Pin LED
69 LED1
67 LED2
64 LED3
60 LED4
27 LED5
24 LED6
18 LED7
15 LED8
Table 3
PLD Pin
68
65
63
58
17
14
10
9
7