Datasheet

1300 Henley Court

Pullman, WA 99163

509.334.6306

www.digilentinc.com

PmodSSD™ Reference Manual

Revised March 30, 2015

This manual applies to the PmodSSD rev. A

DOC#: 502-126

Other product and company names mentioned may be trademarks of their respective owners.

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Overview

The Digilent PmodSSD is a 2 digit seven-segment display commonly used to display a counter or timer.

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.

The PmodSSD.

 Two high bright seven-segment displays

 Great way to view a counter or timer

 Common Cathode configuration

Features include:

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300 Henley Court Pullman, WA 99163 509.334.6306 www.digilentinc.com PmodSSD™ Reference Manual Revised March 30, 2015 This manual applies to the PmodSSD rev. A Overview The Digilent PmodSSD is a 2 digit seven-segment display commonly used to display a counter or timer. Features include:    Two high bright seven-segment displays Great way to view a counter or timer Common Cathode configuration The PmodSSD.
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PmodSSD™ Reference Manual 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.