OBID
i-scan
®
UHF
Manual
ID ISC.LRU3000/3500
FEIG ELECTRONIC GmbH
Page 34 of 193
H90202-7e-ID-B.docx
DC-FORMAT = b110
⇒
Wiegand formatted protocol frame
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.
1 Bit
n Bit
1 Bit
EVEN
DATA
ODD
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.
Example of parity calulation
Example 1: 24 DATA bits
DATA bin 011110110010110101101001
OUTPUT 1 011110110010110101101001 0
`- Even Parity Bit `- Odd Parity Bit
Example 1: 25 DATA bits
DATA bin 0111101100101101011010011
OUTPUT 0 0111101100101101011010011 1
`- Even Parity Bit `- Odd Parity Bit
Timing
The following diagram represents the signal response of the 2 data lines of the
data-/clock-interface in Wiegand emulation.
DATA0
DATA1
1
1
1
0
0
0
t
n
t
n
= 0,5 ms
