HID MaxiProx DFM Reader - 5375 Manuale di installazione - Pagina 18
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Part No. 5375-901, Rev E.1
Case 2:
Customer Code
The output from the reader will look like the following:
The message structure follows the ISO/ABA Track 2 standard. The first character is a start sentinel:
(hex), which is followed by data. After the data there is an end sentinel:
The LRC is the xoring of the message in accordance to the bit position. Each character has an odd
parity bit that covers bit 1 to bit 4 of the nibble.
A typical message:
B 1 2 3 F LRC
the bits broken down:
4.2.5 Bit Stream
The bit stream will consist of 25 leading zeros, the message and fill with zeros until the end of the
message. The message will consist of a minimum of 210 bits.
Example
4.2.6 Output Specification
Page 18 of 19
= 74
are structured as follows:
421 8421
8421 8421 8421 8421 8421 8421 8421 8421 8421
CCC CCCC 1 aaaa bbbb cccc dddd eeee ffff gggg hhhh iiii
CCC CCCC
- Customer code
1
aaaa
- Most significant nibble of message
bbbb
- Second MSN
cccc
hhhh
- least significant nibble of message
iiii
- LRC of nibbles aaaa to hhhh, start (B) and end sentinel (F) (xor of the nibbles or the even parity of the
respective column)
1248p 1248p 1248p 1248p 1248p 1248p 1248p 1248p 1248p 1248p 1248p
<B> <aaaap> <bbbbp> <ccccp> <ddddp> <eeeep> <ffffp> <ggggp> <hhhhp> <F> <iiiip>
start data a data b
data c data d data e
1248p 1248p 1248p 1248p 1248p 1248p
11010 10000 01000 11001 11111 00101
B
1
2
3
F
start <
data
> end LRC
00000000000000000000000000 11010 10000 01000 11001 11111 00100 00000000000000...000000
Vol = 0.8 V
Voh = 3.5 V
sink = 25 ma
source = 5 ma
© 2008 - 2012 HID Global Corporation. All rights reserved.
- fixed bit "1"
- next nibble
data f data g data h end LRC
4
B
1
2
3
F
®
MaxiProx
Installation Guide
F
(hex), followed by an LRC.
LRC
March 2012
B