Re a d e r Func tio na lity
AYC-Fx4 a nd AYC-G x4 fa mily ma nua l Pa g e 21
Option 6: 6 Keys BCD and parity bits, 26-Bit Wiegand
Se nd s b uffe r o f 6 ke ys, a d d s p a rity a nd se nd s a 26-Bit Bina ry-
C o d e d De c ima l (BC D) me ssa g e . Ea c h ke y is a fo ur b it e q uiva le nt
o f the d e c ima l num b e r.
The ke yp a d PIN c o d e m ust b e 6 ke y p re sse s lo ng . O n the sixth ke y
p re ss o f the 6 d ig it PIN c o d e , the d a ta is se nt a c ro ss the Wie g a nd
Da ta line s a s a BC D me ssa g e .
If the e ntry o f the 6 d ig it ke yp a d PIN c o d e is d isrup te d a nd no
numb e r ke y is p re sse d within 5 se c o nd s, the ke yp a d will c le a r the
PIN c o d e e ntry b uffe r, g e ne ra te a m e d ium le ng th b e e p a nd is
re a d y to re c e ive a ne w 6 d ig it ke yp a d PIN c o d e .
(EP) AAAA BBBB C C C C DDDD EEEE FFFF (O P)
Whe re :
EP = Eve n p a rity fo r first 12 b its.
O P = O d d p a rity fo r la st 12 b its.
A = The first ke y e nte re d .
D = Fo urth ke y e nte re d
B = Se c o nd ke y e nte re d
E = Fifth ke y e nte re d .
C = Third ke y e nte re d
F = Sixth ke y e nte re d
Option 7: Single Key, 3x4 Matrix Keypad (MD-P64)
This uniq ue mo d e is inte nd e d to le t the ho st c o ntro lle r sc a n the
AYC -Fx4/ AYC -G x4 ke yp a d while still ke e p ing the p ro ximity c a rd
re a d e rs 26-Bit Wie g a nd o r Clo c k & Da ta fo rm a ts a c tive .
An o p tio na l inte rfa c e b o a rd m ust b e use d b e twe e n the AYC -
Fx4/ AYC -G x4 a nd the ho st syste m . Ea c h ke y p re ss is im m e d ia te ly
se nt o n DATA0 a s a n ASCII c ha ra c te r a t a b a ud ra te o f 9600 b its
p e r se c o nd .
Whe n a ke y is p re sse d DATA1 is p ulle d "lo w" until the ke y is
re le a se d a t whic h p o int DATA1 will b e se t to "hig h". This a llo w s the
c o ntro lle r to d e te c t the d ura tio n o f the ke y p re ss.
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