MagTek IntelliStripe 60 99875135 - Manual (Page 20)

IntelliStripe 60, TTL Insertion Reader
12
MAGNETIC STRIPE READER
Mag-Stripe Functions
Data, Strobe, and Card Present (Media Detect) signals are provided with CMOS level signals
that are brought out to the 26-pin I/O connector. The signals are routed as follows:
Pin 15 = TK2 Data
Pin 16 = TK2 Strobe
Pin 23 = TK1 Data
Pin 24 = TK1 Strobe
Pin 25 = TK3 Data
Pin 26 = TK3 Strobe
Pin 22 = Mag Media Detect (Card Present)
Data
Data outputs will follow the MagTek standard where:
Logic Low = “1” bit
Logic High = “0” bit
To reverse the logic, move R36 to position R19.
Strobe
The strobe output is a clocking output. This output is normally high and falls low to indicate a
valid time period for sampling of the Data output. It is recommended that data be loaded by the
user with the leading edge (negative) of the strobe.
Card Present (Mag Media Detect)
This signal is available as an open-drain output, normally high. A low output indicates presence
of flux reversals from one or all of the read heads. The Reader provides a 10K ohm pull-up
resistor for this signal when the Mag read is enabled via pin 20 “Mag-Read Enable” line.
For further information about magnetic stripe readers, refer to MagTek part number 99875148,
I/O Interface for TTL Magnetic Stripe Readers, Technical Reference Manual.
Mag-Read Enable (Sleep Mode)
This CMOS input controls the power to the Mag-stripe read circuits and can be used to reduce
the power consumption of the Reader. The read circuits require no more than 2 ms to power up
from the time that the Mag Read Enable (pin 20) line is taken to a valid logic low. Note that the
Mag Read signals Mag Media Detect (pin 22), Mag Strobe Track 1 (pin 24), Mag Strobe Track 2
(pin 16), and Mag Strobe Track 3 (pin 26) will float when Mag reading is disabled by setting the
Mag Read Enable line high (Default).