5. Communication Settings
bit is 0 and there are already three 1’s. After 0 is suffixed to 1000110, there is
still an odd number of 1’s.
e: Indicates the even check, that is, there is an even number of 1’s in the bit
sequence (including one parity bit). For example, for 1000110(1), the parity
bit is 1 and there are already three 1’s. After 1 is suffixed to 1000110, there is
an even number of 1’s.
b: Indicates both odd check and even che ck.
For example, Definitions of several universal Wiegand formats.
Wiegand34
Card Format bits:
pccccccccccccccccccccccccccccccccp
Parity Format bits:
eeeeeeeeeeeeeeeeeooooooooooooooooo
Note: Wiegand34 consist s of 3 4 bit s. The f irst bit is the ev en p arity bit of b it s 2
to 17; the 34
th
bit is the odd parity bit of bits 18 to 33; the second to the ninth
bits are the site code; the 10
th
to the 25th bits are the card number.
Wiegand37a
Card Format bits: pmmmmsssssssssssscccccccccccccccccccp
Parity Format bits: oeobeobeobeobeobeobeobeobeobeobeobeoe
Note: Wiegand37a consists of 37 bits. The first bit is the odd parity bit of bits
3, 4, 6, 7, 9, 10, 12, 13, 15, 16, 18, 19, 21, 22, 24, 25, 27, 28, 30, 31, 33, 34
and 36; the 37
th
bit is the odd parity bit of bits 2, 4, 5, 7, 8, 10, 11, 13, 14, 16,
17, 19, 20, 22, 23, 25, 26, 28, 29, 31, 32, 34 and 35; bits 4, 7, 10, 13, 16, 19,
22, 25, 28, 31 and 34 participate in both odd and even parity check. Bits 2 to
5 are manufacturer code; bits 6 to 17 are the site code; bits 18 to 36 are the
card number.
55