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Transponder / ID cards
5.3
Transponder data formats
5.3.1
Wiegand binary
Example 1
UID hex
UID bin
Output
Example 2
UID hex
UID bin
Output
e:
Data bits for forming the even parity bit
o:
Data bits for forming the odd parity bit
16
Siemens Building Technologies
Fire Safety & Security Products
0x00
Wiegand, binary
0x01
Magstripe Track II, binary
0x02
Magstripe Track II, decimal
Data format/encoding
Data output is binary 1 to 1, as encoded on the transponder.
Data coverage
The bit at which data output begins and the number of bits output are defined by
the D_START and D_LGT parameters.
Parity bits
The reader forms an odd and an even parity bit and appends them for data output.
Number of bits output = D_LGT + 2.
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.
MSB.....................................................LSB
0
2
5
8
0000 0010 0101 1000 0111 1011 0010 1101 0110 1001 0010 0001
MSB.....................................................LSB
0
2
5
8
0000 0010 0101 1000 0111 1011 0010 1101 0110 1001 0010 0001
7
B
2
D
|<----- D_LGT = 22 -------|
ee eeee eeee e
ooo oooo oooo
1 11 1011 0010 1101 0110 1001 1
`- Even parity bit
7
B
2
D
|<------- D_LGT = 25 ---------|
eee eeee eeee ee
ooo oooo oooo oo
1 111 1011 0010 1101 0110 1001 00 1
`- Even parity bit
6
9
2
1
`- D_START = 8
`- Odd parity bit
6
9
2
1
`- D_START = 6
`- Odd parity
12.2005
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