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11 - 16 LI4278 Product Reference Guide
UPC-A Preamble
Parameter # 34
Preamble characters are part of the UPC symbol, and include Country Code and System Character. There are
three options for transmitting a UPC-A preamble to the host device: transmit System Character only, transmit
System Character and Country Code (“0” for USA), and transmit no preamble. Select the appropriate option to
match the host system.
No Preamble (<DATA>)
(00h)
*System Character (<SYSTEM CHARACTER>
<DATA>)
(01h)
System Character & Country Code
(< COUNTRY CODE> <SYSTEM CHARACTER>
<DATA>)
(02h)