MCS3142 datasheet(19/57 Pages) MICROCHIP

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MCS3142 DUAL KEELOQ® ENCODER

WIRELESS REMOTE CONTROL

DEVELOPMENT KIT USER’S GUIDE

 2014 Microchip Technology Inc.

DS40001746A-page 18

Chapter 3. Hardware Self-Test

3.1

INTRODUCTION

A hardware self-check can be performed to ensure the hardware integrity of the

Embedded Security Development Board. The instruction of the hardware self-check is

displayed on the LCD. The test result is either checked by firmware and displayed on

the LCD, or verified by user observation.

To initiate the hardware self-check, press and hold push button SW1 before

powering-up the Embedded Security Development Board. SW1 can then be released

when “HDW Self Tests” is displayed on the LCD screen.

3.2

BUTTON TESTS

“Button Test” will be displayed on the first line of the LCD display. Test instructions

of pressing individual buttons will be displayed on the second line of the LCD display.

Once a required push button is pressed, the test instruction message will be changed

for the next push button. Once all push buttons have been tested, SW1 needs to be

pressed to move forward to the LED test.

3.3

LED TESTS

There are two sets of LEDs. When the LED tests start, the message “LEDs Flashing”

will be displayed on the first line of the LCD display. During the tests, two sets four LEDs

(D4-D7) and seven LEDs (D8-D14) will flash in a pattern. The user should observe that

all LEDs are turned on and off with flashing intervals of roughly one second. Once the

user has verified the LED test, SW1 needs to be pressed to move forward to the RTCC

test.

3.4

RTCC TEST

When RTCC tests are initiated, the LCD display will show the clock and calendar. If no

coin battery for the RTCC has been installed, the time displayed will be close to the

reset time of January the 1st, 2012. If a coin battery for RTCC is installed, the time

displayed will be based on whatever was previously set, plus the time that has passed.

Observe that the clock is advancing. Once the RTCC test is done, SW1 needs to be

pressed to move forward to the SPI test.

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