OBID
i-scan
®
UHF
Manual
ID ISC.LRU3000/3500
FEIG ELECTRONIC GmbH
Page 33 of 193
H90202-7e-ID-B.docx
Timing:
The following diagram represents the signal response of the 2 data lines of the
data-/clock-interface in magnetic strip emulation.
1
0
1
0
t
n
t
a
t
b
/CLOCK
/DATA
0
t
n
= 0,5 ms
t
a(n)
≈
t
n
/ 3
t
b(n)
≈
t
n
/ 2
7.2.2. Wiegand Emulation
Data Format:
The following description represents the data coding depending on DC-FORMAT
DC-FORMAT = b000
⇒
binary 1:1
In this configuration the output data format is equal to the data coding on the
Transponder. The Reader doesn't add a protocol frame e.g. parity Bits or start or
stop signs across the data stream.
DC-FORMAT = b100
⇒
Wiegand formatted protocol frame with start and stop sign
In this configuration the Reader build the protocol frame with one even parity bit
at the beginning and one odd parity bit at the end and one start and one stop
sign:
4 Bit
1 Bit
n Bit
1 Bit
4 Bit
START
EVEN
DATA
ODD
STOP
START:
b1011
EVEN:
Even parity bit calculated across the first half DATA bits.
DATA:
Data bits as read from the Transponder and defined in scan-
mode settings.
ODD:
Odd parity bit calculated across the last half DATA bits.
STOP:
b1111