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MaxiProx

Installation Guide Part No. 5375-901, Rev E.1

March 2012 Page 17 of 19

4.2.2 Data Timing

The outputs, Card Present, Data and Strobe are low going signals and the following timing chart

describes the timing.

0 0 0

1 1

0 0 0 0 0

1 1 1 1

0 0 0 0

bit time strobe width

card present

data

clock/

strobe

1st valid bit

Note: the first 25 bits and trailing bits are zeros, not shown above.

Table 11: Data Timing - Timing Chart

• bit time = 1.5ms (default)

• strobe width = bit time/3 (33% of bit time), default = 500us

• Clock/Strobe is valid 1.5ms (one clock cycle, min) after card present is asserted

• Data is valid 10us (min) before the negative edge of clock/strobe

• Card Present returns to the high-level 50 ms (max) after the last clock/strobe.

The above timing is representative of a magnetic stripe card traveling at 8.9 inches per second. The

timing is to be adjustable for cards traveling at 4 inches per second to 20 inches per second. This

relates to bit times of 3.3 ms and 666us, respectively. There are 75 bits per inch on Track 2.

4.2.3 Output signal Levels

Inputs: low threshold = 0.8 volts high threshold = 3.5 volts

4.2.4 Bit structure

The reader will read an 1849 or compatible chip that is encoded with 44 bits of data. The data will be

programmed in accordance with ProxGuard formatting. The data will be packed into the ABA/ISO

Track 2 message format in accordance with the following rules based on customer code:

Case 1:

Customer Code = 0, 1, 63, 72, 73 or other, will have the data output as follows.

The output is in the Track 2 character format but the bits are packed in sets of three bits (octal):

ccc CCCC a bcd efg hij klm nop qrs tuv wxy zAB CDE FGH IJK

Where cccCCCC is the customer code, abc...IJK is the programmed data on the card.

1248p 1248p 1248p1248p 1248p1248p 1248p1248p1248p1248p 1248p1248p1248p 1248p 1248p 1248p 1248p1248p1248p

HID MaxiProx DFM Reader - 5375 User Manual

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