9
SECTION 3. OPERATION
This section describes the LED Indicator and Card Read.
LED INDICATOR
The LED indicator will be either off, red, or green. When the device is not powered, the LED
will be off. When the device is first plugged in, the LED will be red. As soon as the device is
plugged in, the host will try to enumerate the device. Once the device is enumerated the LED
will turn green indicating that the device is ready for use. When a card is being swiped, the LED
will turn off temporarily until the swipe is completed. If there are no errors decoding the card
data then the LED will turn green. If there are any errors decoding the card data, the LED will
turn red for approximately two seconds to indicate that an error occurred and then turn green.
Anytime the host puts the device into suspend mode, the LED will turn off. Once the host takes
the device out of suspend mode, the LED will return to the state it was in prior to entering
suspend mode.
CARD READ
A card may be swiped through the Reader slot when the LED is green. The magnetic stripe must
face toward the front (the side with the LED) and may be swiped in either direction. If there is
data encoded on the card, the device will attempt to decode the data and then send the results to
the host via a USB HID input report. After the results are sent to the host, the device will be
ready to read the next card.
Содержание ET1725L Series
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