5
ATF15xx-DK3-U Development/Programmer Kit [USER GUIDE]
Atmel-8961A-CPLD-ATF15xx-DK3-U-Development-Kit-UserGuide_072015
7-segment Displays with Selectable Jumpers
The CPLD Development/Programmer Board contains four 7-segment displays which allow the
observation of the ATF15xx CPLD outputs. These four displays are labeled as DSP1, DSP2, DSP3,
and DSP4. The 7-segment displays have common anode LEDs with the common anode lines
connected to the VCCIO (I/O supply voltage for the CPLD) through a series of resistors with selectable
jumpers labeled as JPDSP1, JPDSP2, JPDSP3, and JPDSP4. These jumpers can be removed to
disable the displays by unconnecting the V
CC
IO to the displays. Individual cathode lines are connected
to the I/O pins of the ATF15xx CPLD on the CPLD Development/Programmer Kit. To turn on a
particular segment, including the DOT of a display, the corresponding ATF15xx I/O pin connected to
this LED segment must be in a logic low state with the corresponding selectable jumper set; therefore,
the outputs of the ATF15xx device will require configuration for active-low outputs in the design file.
The displays work best at 2.5V V
CC
IO or higher.
Each segment of each display is hard-wired to one specific I/O pin of the ATF15xx device. For the
higher pin count devices (100-pin and larger), all seven segments and the DOT segments of the four
displays are connected to the I/O pins; however, for the lower pin count devices, only a subset of the
displays, first and fourth displays, are connected to the ATF15xx device’s I/O pins. Tables
1
and
2
show the 7-segment display package connections to the ATF15xx device. The circuit schematic of the
displays and jumpers is shown in the figure below.
Figure 2.
Circuit Diagram of 7-segment Display and Jumpers
a
b
c
d
e
f
Vc1
Vc2
g
a
b
c
d
e
f
g
DOT
DSP1
a
b
c
d
e
f
Vc1
Vc2
g
a
b
c
d
e
f
g
DOT
DSP2
a
b
c
d
e
f
Vc1
Vc2
g
a
b
c
d
e
f
g
DOT
DSP3
a
b
c
d
e
f
Vc1
Vc2
g
a
b
c
d
e
f
g
DOT
DSP4
RDSP21
RDSP22
RDSP23
RDSP24
RDSP25
RDSP26
RDSP27
RDSP31
RDSP32
RDSP33
RDSP34
RDSP35
RDSP36
RDSP37
RDSP41
RDSP42
RDSP43
RDSP44
RDSP45
RDSP46
RDSP47
VccIO
DOT2
DOT3
DOT4
RDOT2
RDOT3
RDOT4
D4A
D4B
D4C
D4D
D4E
D4F
D4G
JPDSP1
JPLED1
JPDSP2
JPLED2
JPDSP3
JPLED3
JPDSP4
JPLED4
RDOT1
RDSP1
1
RDSP12
RDSP13
RDSP14
RDSP15
RDSP16
RDSP17
DOT1
D1A
D1B
D1C
D1D
D1E
D1F
D1G
D2A
D2B
D2C
D2D
D2E
D2F
D2G
D3A
D3B
D3C
D3D
D3E
D3F
D3G
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