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Symbol PL4507 Decoder Integration Guide
Symbol PL4507 Electrical Information
Power Supply Requirements
The Symbol PL4507 decoder board can be powered from one of two possible supply voltages: Host 5 VDC or
3.3 VDC. The PL4507 uses an intelligent hardware multiplexer to configure the most efficient power supply
arrangement for the combined PL4507/SE4500 system.
multiplexer.
PL4507
SUPPLY
SOURCES
5V DC
Host
Connector
3.3V DC
Host
Connector
Symbol PL4507 Power Supply Multiplexer
Figure 2-2
The multiplexers are low resistance switches that automatically select between their A and B inputs. If both inputs
are present (e.g., Host 5 VDC and Host 3.3 VDC) the A input takes precedence.
This arrangement allows powering the PL4507 using 3.3 V, 5 V, or combined supply voltages that offer improved
efficiency for the overall system due to the different supplies that the PL4507 decoder and SE4500 imager engine
require internally.
PMIC Supply
A
A
B
B
A
A
3.3V
B
B
REG
PXA320 Power Control
Figure 2-2
shows a block diagram of the supply
Engine Power
Enable
(PXA320 GPIO)
PXA320
GPIO Supply
SE4500
INTERFACE
Illumination
Power
3.3V or 5V
Sensor and
Microcontroller
Power
3.3V
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