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PmodSSD™ Reference Manual
Revised May 24, 2016
This manual applies to the PmodSSD rev. A
Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.
Overview
The PmodSSD is a two-digit seven-segment display. Users can toggle through GPIO signals which digit is currently
on at a rate of 50Hz or greater to achieve persistence-of-vision to give the effect of both digits being lit up
simultaneously.
1 Functional Description
The PmodSSD utilizes a common cathode configuration to display a variety of LED segment combinations. The ten
segment combinations corresponding to digits 0 - 9 are generally the most useful, although other custom
combinations can also be created.
2 Interfacing with the Pmod
The PmodSSD communicates with the host board via the GPIO protocol. A logic level high signal on a particular
anode will light up that respective segment on whichever digit is currently enabled. Users are able to select a
particular digit by driving the Digit Selection pin (C) to a logic high or low voltage.
Two-digit high brightness seven-segment
display
Easily view a counter or timer
Common Cathode configuration
Small PCB size for flexible designs 1.0“ ×
1.7” (2.5 cm × 4.3 cm)
Two 6-pin Pmod connectors
with GPIO interfaces
Follows Digilent Pmod Interface
Specification Type 1
