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7.4 Structure of the data base
1 Byte for Attribute (# = no attribute, 'A' ... 'Z') - transmitted as 1 ASCII-
character
6 Byte for Date/clock in BCD-Format - transmitted as 12 ASCII- characters
1 Byte for Code length (1 ... 16) - transmitted as 1 ASCII- character '0' .. '9',
'A' .. 'F'
The code length is encoded as follows: Value of the ASCII-character =
hex character describing (length – 1).
Example:
length =16; length - 1 =15; hex character = 0xF; ASCII-
character = 'F' = CHR(0x46).
8 Byte for the Code (up to 16 nibbles, starting left ) - transmitted as 16 ASCII-
characters
1 Byte for Type of transponder - transmitted as 1 ASCII- character
0 = no known transponder
1 = ISO-FDX
2 = ASK 64Bit
3 = Trovan
4 = Datamars
5 = Destron
6 = ISO-Hdx
7 = Hitag 1/S
8 = Hitag 2
9 = Pontech
A = PSK 2
B = PSK 1
C = PSK 2
D = BDE FDX
E = BDE HDX
F = ISO 14443A 4 Byte
G = ISO 14443A 7 Byte
H = ISO 15693
U = EM 4305
14 Byte for Text (up to 14ASCII's in the range 0x20 ... 0x7F) - transmitted as
14 ASCII- character
K
0
1
0
1
0
1
0
0
0
1
3
Date
Time
0
1
2
3
4
5
6
7
8
9
10
11
12
Example: description of a record – (sequence of characters at the interface):
STX 'K010101000133F2858997D3A4F00001______________46F6' ETX
---------------------------------------------------------------35/51---------------------------------------
3
F
2
8
5
8
9
9
7
D
3
A
4
Code (64Bit)
13
14
15
16
17
18
19
20
21
22
23
24
25
F
0
0
0
0
1
_
_
_
_
_
_
_
Text
26
27
28
29
30
31
32
33
34
35
36
37
38
_
_
_
_
_
_
_
4
5
F
6
39
40
41
42
43
44
45 46 47 48 49 50
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