Motorola Symbol PL4507 Integration Manual page 37

Symbol SE4500 Signal Descriptions (Continued)
Table 2-2
Signal Name
GND Power supply
PIXCLK Pixel clock used to synchronize the
decoder to the pixel data
GND Power supply
Note: Signal directions are listed relative to the PL4507 decoder module.
Symbol PL4507 Signal Descriptions
Table 2-3
Signal Name Description
HOST_DOWNLOAD PL4507 download
signal
HOST_3P3 +3.3 V power supply
GND System ground
HOST_RXD RS-232 receive
HOST_TXD RS-232 transmit
HOST_CTS RS-232 Clear To
Send control signal
HOST_RTS RS-232 Request To
Send control signal
POWER_DOWN Status signal from the
PL4507 indicating
power down state
BEEPER_OUT Pulse width
modulated output
used to control an
external beeper
HOST_DEC_LED* Active low output
used to indicate a
valid bar code
decode
Note: Signal directions are listed relative to the PL4507 decoder module.
Description Dir
Host
Dir Connector
Pin
In 1
In 2
3
In 4
Out 5
In 6
Out 7
Out 8
Out 9
Out 10
Engine
Interface
- 19 SE4500 power supply return
In 20 Pixel clock returned from the
SE4500
- 21 SE4500 power supply return
Control State
L = PL4507 in Signal is sampled immediately
software download following a reset state. It
mode indicates to the PL4507 the
H = No action system is ready to accept a new
software image.
PL4507 supply voltage
PL4507 power supply return
See
See
L = Normal state
H = Engine is in a
power down state
The beeper output ranges from
2.352 KHz to 2.963 KHz. The
beeper output is a 50% duty
cycle square wave at maximum
volume, 12.5% at low volume.
Normally used as a control signal
for beeper drive circuit. Control
line can source/sink 5 mA.
L = Led On Normally used as a control signal
H = Led off for an LED drive circuit. Control
line can source/sink 5 mA.
Installation 2 - 9
Comments
Comments
Typical Input Circuit
Typical Input Circuit