Overview
Integration Guide
11
Description:
• POWER_ON signal can be used by host to switch-on/off the whole Scan
Engine: leave it unconnected if not used
• HW_TRIGGER signal can be used to physically
• issue a “trigger pressure” event to the Scan Engine: leave it uncon-
nected if not used
• VBUS, D+, D- and GND are the standard USB interface lines
HW_TRIGGER Signal
This paragraph describes different ways to drive the HW_TRIGGER signal in
order to instruct the Decoder to start acquisition & decode process. Each of
these Scan Modes must be first issued (programmed) to the Decoder before
to use it. The current default configuration is “Trigger Single”.
In the following pictures, “PRESS” and “RELEASE” words refer to the common
meaning of pressing a push button and releasing it in order to obtain a spe-
cific behavior. The current release of the Decoder board has the HW_TRIG-
GER signal with the following level meaning:
Software TRIGGER Commands
The “PRESS” and “RELEASE” events can be issued also by way of the USB com-
munication port (COM emulation only) and the corresponding commands are
listed here below:
Command
ASCII Code
Meaning
X
88 (58h)
PRESS
T
84 (54h)
RELEASE
The behavioral description of the Scan Engine is the same as that shown
above for
Level
Meaning
n/c or ‘0’ = GND
PRESS
‘1’ = VBUS
RELEASE
Summary of Contents for DSE0420
Page 1: ...DSE0420 Integration Guide OEM Area Imager Decoded Scan Engine ...
Page 4: ...ii DSE0420 NOTES ...
Page 16: ...Optical Characteristics 8 DSE0420 NOTES ...
Page 20: ...Electrical Integration 12 DSE0420 NOTES ...
Page 24: ...Software Features 16 DSE0420 NOTES ...
Page 26: ...Quality and Reliability 18 DSE0420 NOTES ...
Page 28: ...Regulatory Safety 20 DSE0420 NOTES ...
Page 32: ...24 DSE0420 Overall Dimensions ...
Page 33: ...Integration Guide 25 Optical features ...
Page 35: ...Integration Guide 27 Interface Connector Characteristics Requirements ...
Page 36: ...28 DSE0420 NOTES ...
Page 37: ......