User's Manual

HF Mifare Easy Module V1.0
ACG Identification Technologies GmbH 39
7.4.3.5.1 Time slotted answer
In party line mode more than one reader can be used simultaneously. The time
slotted answer allows separating all connected devices. The station ID is used to
determine the correct time slot.
The reader supports up to 254 unique time slots. Following formula calculates the
needed time of one time slot. Only one baud rate on the same party line is supported.
6*
10
][
0
Baudrate
sT =
Figure 7-10: Time slot formula
Following figure shows the timing diagram of time slotted answers.
timeslot 0 1 2 3 4 5 … 252 253 254
T
0
T
1
T
2
T
3
T
4
T
5
T
253
T
254
T
255
HOST
'g' →
reader (01)
←
01
reader (03)
←
03
reader (04)
←
04
reader (254)
←
254
Figure 7-11: Timing diagram of time slotted answers