OBID
®
classic-pro
Manual
ID CPR.03.20-CD
FEIG ELECTRONIC GmbH
Page 15 of 40
H60100-5e-ID-B.doc
4.2. Wiegand Interface
The Wiegand interface is designed for unidirectional for data output.
Data format / coding
The UID and DATA-BLOCK output is binary 1 to 1, as encoded on the transponder.
Parity bits
The reader forms an odd and an even parity bit and encapsulates the output data.
The even parity bit is formed for the first half of the transmitted data, the odd parity bit for
the second half of the information transmitted. If there is an odd number of bits to be
transmitted the middle bit is incorporated in the calculation of the even and odd parity bits.
Number of bits output = D_LGT + 2.
Timing
/Data0
/Data1
/CLS
t
v
t
s
1
1
1
0
0
0
t
pw
t
pi
t
pw
≈
50
µ
s
t
pi
≈
500
µ
s
t
v
= t
s
10...12 ms