410-067

410-067 Datasheet

Part	Datasheet
410-067	410-067 (pdf)

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Digilent PmodDIN1 Digital Input Module Board 215 E Main Suite D \| Pullman, WA 99163 509 334 6306 Voice and Fax • a 6-pin header • a 6-pin connector • four digital-input channels • eight protection diodes • four Schmitt-trigger inverters • four debouncing filters • small form factor x Functional Description The Digilent PmodDIN1 Digital Input Module Board the DIN1 debounces digital input signals so they can be used directly by a Digilent system board. The DIN1 can receive signals from switches, sensor devices, or any other standard logic inputs. The DIN1 eliminates errors caused by electrical contacts in switches making and breaking contact several times “bouncing” before settling into position. Debounce P1 Filter Debounce P2 Filter Debounce P3 Filter J1 Connector J2 Connector Each of the DIN1’s four channels has an analog filter consisting of two resistors and a capacitor. The filters absorb and diffuse bounce signals before they can reach the threshold needed to activate the Schmitttrigger inverters. The Schmitt-trigger inverters ensure signals transition quickly and cleanly between low and high logic levels. The DIN1 has protection diodes that prevent damage to the inverters from overvoltage. Resistors protect the DIN1 from conflicting output voltages. The DIN1 has a 6-pin header for easy connection to a Digilent system board. For example, some system boards like the Digilent Pegasus board have a 6-pin header that can connect to the DIN1 with a 6-pin cable. To connect the DIN1 to other Digilent system boards, a Digilent Modular Interface Board MIB and a 6-pin cable are needed. Doc 530-067 P4 GND Vcc Debounce P4 Filter DIN1 Circuit Diagram The DIN1 can be powered by voltage from either a Digilent system board or an outside device. Damage can result if power is supplied from both sources or if the outside device supplies more than 3V. For more information, see the reference manual at Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners.

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Digilent PmodDIN1 Digital Input Module Board
215 E Main Suite D | Pullman, WA 99163
509 334 6306 Voice and Fax
• a 6-pin header
• a 6-pin connector
• four digital-input channels
• eight protection diodes
• four Schmitt-trigger inverters
• four debouncing filters
• small form factor x

Functional Description

The Digilent PmodDIN1 Digital Input Module Board the DIN1 debounces digital input signals so they can be used directly by a Digilent system board. The DIN1 can receive signals from switches, sensor devices, or any other standard logic inputs.

The DIN1 eliminates errors caused by electrical contacts in switches making and breaking contact several times “bouncing” before settling into position.

Debounce P1

Filter

Debounce P2

Filter

Debounce P3

Filter

J1 Connector J2 Connector

Each of the DIN1’s four channels has an analog filter consisting of two resistors and a capacitor. The filters absorb and diffuse bounce signals before they can reach the threshold needed to activate the Schmitttrigger inverters. The Schmitt-trigger inverters ensure signals transition quickly and cleanly between low and high logic levels.

The DIN1 has protection diodes that prevent damage to the inverters from overvoltage. Resistors protect the DIN1 from conflicting output voltages.

The DIN1 has a 6-pin header for easy connection to a Digilent system board. For example, some system boards like the Digilent Pegasus board have a 6-pin header that can connect to the DIN1 with a 6-pin cable. To connect the DIN1 to other Digilent system boards, a Digilent Modular Interface Board MIB and a 6-pin cable are needed.

Doc 530-067

P4 GND Vcc

Debounce P4 Filter

DIN1 Circuit Diagram

The DIN1 can be powered by voltage from either a Digilent system board or an outside device. Damage can result if power is supplied from both sources or if the outside device supplies more than 3V.

For more information, see the reference manual at

Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners.

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Datasheet ID: 410-067 509770