37 Bit Card Format (with facility code)
The HID 37 bit Wiegand format with Facility Code is H10304. The format consists of 2 parity bits, 16 bit Facility Code and 19 bit Cardholder ID fields.
PFFFFFFFFFFFFFFFFCCCCCCCCCCCCCCCCCCCP
EXXXXXXXXXXXXXXXXXX..................
..................XXXXXXXXXXXXXXXXXXO
P = Parity
O = Odd Parity
E = Even Parity
X = Parity mask
F = Facility Code, range = 0 to 65,535
C = Cardholder ID, range = 0 to 524,287
Card Layout
| Card Type: | Wiegand |
| Number of Bits: | 37 |
| Number of bits to sum for Even Parity: | 19 |
| Even Parity start: | 0 |
| Number of bits to sum for Odd Parity: | 19 |
| Odd Parity start: | 18 |
| Number of Facility Code bits: | 16 |
| Facility Code start: | 1 |
| Number of Cardholder ID bits: | 19 |
| Cardholder ID start: | 17 |
| Number of Issue Code bits: | 0 |
| Issue Code start: | 0 |
