PmodSSD™ Reference Manual
Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.
Page 2 of 2
Because only one digit can be lit at a particular time, users that want to use both digits to display a particular value
will need to alternately light up the two digits at least every 20 milliseconds (50 Hz). This will correlate to each digit
being lit up for 10 milliseconds each before the other segment needs to be “turned on”. Higher refresh rates can
be achieved by alternating which digit is currently powered at shorter time intervals.
Header J1
Header J2
Pin Signal Description
Pin Signal Description
1
AA
Segment A
1
AE
Segment E
2
AB
Segment B
2
AF
Segment F
3
AC
Segment C
3
AG
Segment G
4
AD
Segment D
4
C
Digit Selection pin
5
GND
Power Supply Ground
5
GND
Power Supply Ground
6
VCC
Positive Power Supply
6
VCC
Positive Power Supply
Table 1. Pinout description table.
J
1
C
o
n
n
e
c
to
r
P1
P2
P3
P4
AA1
AB1
AC1
AD1
AE1
AF1
AG1
C1
AA2
AB2
AC2
AD2
AE2
AF2
AG2
C2
GND
Vcc
AE
AF
AG
C
GND
Vcc
560
AA
AB
AC
AD
J
2
C
o
n
n
e
c
to
r
P1
P2
P3
P4
GND
Vcc
Figure 1. Seven-segment display connection diagram.
Any external power applied to the PmodSSD must be within 2.7V and 5.25V; however, it is recommended that
Pmod is operated at 3.3V.
3
Physical Dimensions
The pins on the pin header are spaced 100 mil apart. The PCB is 1 inch long on the sides parallel to the pins on the
pin header and 1.7 inches long on the sides perpendicular to the pin header.
