ATF15XXDK3-SAJ44 Atmel, ATF15XXDK3-SAJ44 Datasheet - Page 12

• Manufacturer Part Number: ATF15XXDK3-SAJ44
• Description: ADAPTER SKT ATF15XXBE 84/44PLCC
• Manufacturer: Atmel

Specifications of ATF15XXDK3-SAJ44

• Module/board Type: Socket Module - PLCC
• For Use With/related Products: ATF15xxDK3
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

2.1.2
ATF15xx-DK3 Development Kit User Guide
LEDs with
Selectable Jumpers
Atmel CPLD Development/Programmer Board has eight individual LEDs, which allow
designers to display the output signals from the user I/Os of the ATF15xx CPLD. These
eight LEDs are labeled LED1 to LED8 on the Atmel CPLD Development/Programmer
Board. The cathode of each LED is connected to ground through a series resistor while
the anode of each LED is connected to a user I/O pin of the CPLD through the
JPL1/JPL2/PL3/JPL4/JPL5/JPL6/JPL7/JPL8 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. Figure 2-3 shows 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. Hence, the outputs of
the ATF15xx need to be configured as active-high outputs in the design files. These
LEDs work best at 2.5V VCCIO or higher.
The lower pin-count devices (44-pin) only have four I/Os connected to LED1, LED2,
LED3, and LED4. For the higher pin-count devices (100-pin and larger), all eight LEDs
are connected to the I/Os of the device. Tables 2-5, 2-6, 2-7, and 2-8 show the connec-
tions of the CPLD I/Os to the LEDs in the different package types.
Figure 2-3. Circuit Diagram of the LEDs and Jumpers
Table 2-5. Connections of ATF15xx 44-pin TQFP to LEDs
Table 2-6. Connections of ATF15xx 44-pin PLCC to LEDs
LED #
LED #
LED1
LED2
LED3
LED4
LED1
LED2
LED3
LED4
PLD Pin #
PLD Pin #
28
25
22
19
34
31
28
25
Hardware Description
3605B–PLD–05/06
2-5