MF7xx
PROMAG
REV.C
17
ANNEX C. ABA TK2 Interface
The timing for Card Present, Clock (Strobe) and Data , example as below:
DATA
The data signal is valid while the clock is low. If the Data signal is high, the bit
is a zero. If the Data signal is low, the bit is a one.
CLOCK (STROBE)
The Clock signal indicates when Data is valid. It is recommended that Data be loaded
by the user with the leading edge (negative) of the Strobe.
CARD PRESENT
Card Present will go low after flux reversals from the Reader. Card Present will return
high after the last flux reversal.
Connect the ABA TK2 wires, example as below:
Clock (White)
Data (Green)
HOST/Terminal
Optional: External LED/Buzzer Control (Brown)
(Red)
(Black)
MF700
9~12VD
GND
GND
Card Present (Orange)
0 0 0 . . . 0 1 1 0 1 0 0 1 . . . 0 0 0
Leading Zero
Data
Trailing Zero
/CARD PRESENT
/STROBE
(CLOCK)
/DATA
Bit Time 40IPS (min:280us, typ:330us, max:480us)
STROBE Width Approximately 25~50% Of Bit Time
