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ATF15xx-DK3-U Development/Programmer Kit [USER GUIDE]
Atmel-8961A-CPLD-ATF15xx-DK3-U-Development-Kit-UserGuide_072015
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
CC
IO or higher.
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.
Table 3
shows the different package connections of the CPLD I/Os to the LEDs.
Figure 3.
Circuit Diagram of the LEDs and Jumpers
Table 3.
ATF15xx Connections to LEDs
44-pin TQFP
44-pin PLCC
84-pin PLCC
100-pin TQFP
LED
PLD Pin
LED
PLD Pin
LED
PLD Pin
LED
PLD Pin
LED1
28
LED1
34
LED1
69
LED1
68
LED2
25
LED2
31
LED2
67
LED2
65
LED3
22
LED3
28
LED3
64
LED3
63
LED4
19
LED4
25
LED4
60
LED4
58
LED5
27
LED5
17
LED6
24
LED6
14
LED7
18
LED7
10
LED8
15
LED8
9
LED8
GREEN
LED7
GREEN
LED6
GREEN
LED5
GREEN
JPL8
SIP2
JPL7
SIP2
JPL6
SIP2
JPL5
SIP2
RL8
330
RL7
330
RL6
330
RL5
330
LED1
LED2
LED3
LED4
LED5
LED6
LED7
LED8
LED4
GREEN
LED3
GREEN
LED2
GREEN
LED1
GREEN
JPL4
SIP2
JPL3
SIP2
JPL2
SIP2
JPL1
SIP2
RL4
330
RL3
330
RL2
330
RL1
330
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