User's Manual
76
Appendix 1 - Wiegand data format
The 26 bits of transmission consists of two parity bits and 24
code bits. The eight rst code bits are encoding the facility code.
This code identies each Morphoccess in a network. The 16
other bits are data bits. The rst bit transmitted is the rst parity
bit. It is even parity calculated over the rst 12 bits. The last bit
transmitted is the second parity bit. It is odd parity bit calculated
over the last 12 code bits.
Even parity (1 bit) Facility code (8
bits)
Data (16 bits) Odd parity (1 bit)
Compliant with access control 26-Bit - Wiegand reader interface
standard 03/1995.
Appendix 1