UPASS ACCESS | INSTALLATION GUIDE
Connections
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start-sentinel (0xB). The message is terminated with an end-sentinel character (0xF)
and an LRC character.
The figure below shows the timing for one magstripe character. Each bit consists out
of one period low (220µsec) and two periods high (440µsec). The Data-signal is valid
and stable on the falling edge of the Clock-signal. Before and after the data 16 clock
pulses are generated (postamble and preamble).
odd par
msb
lsb
3300µsec
0
1
1
0
1
220µsec
660µsec
5V
0V
CLK
5V
0V
DAT
Timing constants:
Clock period
660µsec
Clock high
440µsec
Clock low
220µsec
Data pre-amble 16 clock periods
Data post-amble 16 clock periods
Figure 4: Magstripe protocol timing one character
3.3
LED CONTROL
The built-in high intensity LED provides visual feedback that the tag has been read
or authorized. The LED and buzzer can be controlled by the access control system.
Automatic mode:
Default the uPASS Access will automatically control the LED.
During stand-by the LED will be BLUE and upon identification it will be GREEN.
These colors can be changed!
Remote control:
The LED can be controlled remotely by a connected access control system. Digital
inputs will determine the color indicated on the LED. Use UHFTOOL to enable the
Remote LED control mode.
RED/BLU Led_UL_IN*
WHITE
Led_NA_IN*
BLUE
Beeper_IN*
BLACK
Ground
SHIELD
Shield connected to DC-ground.
