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Symbol PL4507 Decoder Integration Guide
Theory of Operation
During image capture:
The image sensor array in the Symbol SE4500 captures an image of the bar code through the engine's optical
1.
lens. If necessary, the engine automatically adjusts illumination, exposure, and other parameters to obtain the
best quality image.
The SE4500 sends the image to Symbol PL4507 decoder board.
2.
The PL4507 processes the image to identify the target bar code(s), decodes them, and transmits the decoded
3.
data to the host.
Set various parameters provided in this guide to adjust the performance of the Symbol SE4500 and PL4507 to
match the application or desired usage profile.
Symbol PL4507 Decoder
Figure 1-1
shows a block diagram for the decoder.
HOST
INTERFACE
USB (D+/D-)
RS-232
Miscellaneous
Signaling
Power (5V)
Symbol PL4507 Decoder Block Diagram
Figure 1-1
13 MHz
32 kHz
XTAL
XTAL
Application
Processor
624 MHz
Marvell PXA320
1 Gbit NAND Flash
M12 Mbit SDRAM
On-Board
Regulation and
Supply Control
INTERFACE
PL4507
Camera Port
2
I
C Command
and Control
PXA320 Power
Miscellaneous
Signaling
PMIC
SE4500
Power
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