Intermec 6804DM, Technical Reference Manual

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Operation SECTION 4
4-46 Intermec Portable Printers Technical Reference Manual
buffer before prompting the insertion of the card to assure
the data is from the card about to be inserted, and not a
previously read card.
An application, then, may choose the following sequence if
the operator of the equipment is trained (i.e. not a “consum-
er” end user); this uses the automatically generated LED/
Buzzer status indicators
"
Handheld prompts the user to insert, then remove
card
"
Operator inserts card (waking up the reader) and
waits for green LED, then removes card
"
Handheld polls the 6804 and 6808 TCR printers wait-
ing for data to be available
Or, if the operator is an “untrained consumer”, the applica-
tion may choose a more step--by--step approach and handle
handheld screen prompts and LED/Buzzer as required:
1. Handheld prompts the user to insert their card
2. User inserts the magnetic card into the card reader
slot waking up the reader
3. Handheld polls the reader looking for the card to be
inserted
4. When the handheld sees the card is inserted, it
prompts user to remove card
5. 6804 TCR automatically reads and buffers card data
from any or all of Tracks I, II, and III
6. Handheld polls the reader looking for the card to be
removed
7. Handheld requests card data from reader
Smart Card Reader
Smart cards vary widely (some are microprocessor based,
some are memory only; all may have security). In addition,
memory cards have data organization and microprocessor--
based cards have a file structure that is defined by the ap-
plication.