User's Manual

24
25
Appendix 2 - Wiegand data format
The 26 bits of transmission consists of two parity bits and 24 code
bits. The 8 rst code bits are encoding the facility code. This code
identies each MorphoAccess
TM
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 2