Stid ultrys, User Manual

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© STid – MU_ULTRYS_V3.0.1_EN
Clock & Data 2B
Reading an ID of 5 bytes (40 bit) and convert to decimal.
Message
The frame consists of a first series of 16 synchronization zeros followed by 5-bit characters (4 bits,
LSB first, plus 1 parity bit). It ends with 1 trailing zero without a clock.
The message consists of the following:
Start Sentinel : 1character 1011b (0x0B) – parity bit 0. Transmission 1101 0
Data : According to the protocol: 13 or 10 decimal characters
End Sentinel : 1character 1111b (0x0F) - parity bit 1. Transmission 1111 1
LRC : 1 control character, which is the « XOR » of all characters of all
characters sent from "Start Sentinel" to "End Sentinel".
Trailing zero : The "Data" signal encodes a "0" until "Code" returns to its normal
position.
During this time, there is no activity of the "Clock" signal.
Example
For a hexadecimal user code of “0x187E775A7F”, the output code will be: “0105200966271”.
Frame sent by reader will be:
000... 1101 0 0000 1 1000 0 0000 1 1010 1 0110 1 0100 0 1110 0 1000 0 1111 1 1111 1 0000
B 0 1 0 5 2 009 6 6 2 7 1 F F
16 Zeros S.S Char.1 Char.2 Char.3 Char.4 Ch ar…. Char.10 Char.11 Char.12 Char.13 E.S LRC Zero
VARIANT Decoding Data Values
2B Decimal (BCD) 13 characters 0 to 9
16 leading zeros Start Sentinel Data End Sentinel LRC 1 trailing zero