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7) WIEGAND 37 bit with site code and channel information
1
2 3 4 5 6 7 8 9 10 11 12 13 14 15
S1
= "0000000000001"
ON
"even parity bit" for the bits 2-19
1
2 3
4
Attention!
The code is limited to 524'287.
8) WIEGAND 37 bit D10302
1
2 3 4 5 6 7 8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
S1
= "1010000"
ON
"even parity bit" for the bits 2-19
1
2 3
4
9) WIEGAND 37 bit D10302 (BCD)
1
2 3 4
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
S1
= "101"
ON
"even parity bit" for the bits 2-19
1
2 3
4
Attention! The code is limited to 99'999'999.
10) WIEGAND 50 bit
1
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
"0"
S1
"1"
ON
"even parity bit " for the bits 2-25
1
2 3
4
16 17
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
binary code output, 18 (msb), 36 (lsb)
Channel
information
"odd parity bit" for the bits 19-36
bit 16 bit 17 CH
0
0
A
0
1
B
1
0
C
1
1
D
binary code output, 9 (msb), 36 (lsb)
"odd parity bit" for the bits 19-36
"odd parity bit" for the bits 19-36
22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49
binary output code, 22 (msb), 49 (lsb)
"0"
"odd parity bit" for the bits 26-49
11) WIEGAND 50 bit with channel information
1
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
37
"0"
S1
"1"
ON
"even parity bit" for the bits 2-25
1
2 3
4
Frame make up for the WIEGAND signals
The frame in the WIEGAND format is emitted
by means of the D0 and D1 signals. The
duration of each single bit is 50μs while
37
the waiting period between one bit and the
next is 2 ms.
6. ISO2 protocol (bit flow sequence)
The frame leaving the interface is formed of 16
characters. Each character is made up of 5 bits
according to the table on the left, where the most
37
significant bit is B4, and the least significant is B1.
The parity bit is odd parity for B4, B3, B2, B1.
The frame is as follows: START + CHANNEL
(1 character) + SEP + CODE (10 characters) +
SEP + END + LRC, i.e. 16 characters altogether.
Frame composition diagrams for ISO2 signals
There are three ISO2 signals: CLS (Card
Loading Signal), RCP (Read Clock Pulse)
50
and RDP (Read Data Pulse). The 3 signals
are active low
30
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
binary output code, 20 (msb), 47 (lsb)
"0"
bit 48 bit 49 CH
0
0
A
0
1
B
"odd parity bit" for the bits 26-49
1
0
C
1
1
D
1
D1
D0
50 s
2ms
Parity B4 B3 B2 B1 Character
1
0
0
0
0
0
0
0
0
1
0
0
0
0
1
1
0
1
1
0
1
0
0
1
0
1
0
1
1
0
0
1
0
0
1
1
0
1
1
CLS
RCP
RDP
5ms
48 49
50
Channel information
0
1
0
0
0
0
1
1
1
0
2
1
1
3
0
0
4
0
1
5
1
0
6
1
1
7
0
0
8
0
1
9
1
1
START
0
1
SEP
1
1
END
5ms
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