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22
IS4823 and IS4825 Scan Engines
Operating Modes
Activation Modes
³
4
1
³
1
1
³
1
2
³
1
1
³
9
1
* Activate Scanning with the External Trigger –
An external I/O pin is used to enable the scanning
8
3
0
4
cycle. A High-to-Low transition on the I/O signal is
used to activate scanning. The signal must be
deactivated (HIGH) and re-activated for
subsequent scanning cycles. The scanning cycle
is terminated based on the default period of time
(2 seconds), a variable period of time, when the
I/O signal is deactivated (Low-to-High), or when a
bar code is scanned and transmitted.
Activate Scanning on Receipt of the <DC2>
Character – A received <DC2> character initiates
8
1
1
0
the scanning cycle. The scanning cycle is
terminated based on the default period of time
(2 seconds), variable laser timeout selected, or
when a bar code is scanned and transmitted.
Activate Scanning Using D/E – A received 'E'
character initiates the scanning cycle. The
0
3
1
6
scanning cycle is terminated based on the default
period of time (2 seconds), variable laser timeout
selected, or receipt of a 'D' or when a bar code is
scanned and transmitted.
Activate Scanning with Address
configurable address character is used to initiate
7
4
1
5
scanning. The scanning cycle is terminated based
on the default period of time (2 seconds), variable
laser timeout selected, or when a bar code is
scanned and transmitted.
~ Address Value – Use this bar code with a code
byte sequence (on page 16–1) that represents
7
5
0
0
the desired character to be used to initiate
scanning. An ASCII reference table is available
on page 16–3.
–
A
22–1
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