Micro-reader Module
25 July 1996
3.2 Protocol Micro-reader to PC
Start Length
BCC
Status Data
Byte
Contents (hexadecimal value)
0
Start Mark (SOH, 01hex)
1
Length
2
Status
3
Data Field (1) (LSByte)
.
.
.
N+2
Data Field (N) (MSByte)
N+3
BCC
Refer to Section 6.2 for examples.
3.2.1 Start Mark
The ‘Start-Mark’ signifies the beginning of a message. It is represented by the ASCII character SOH
(Start Of Header: 01hex).
3.2.2 Length
The ‘Length’ byte indicates the length, in bytes, of the following Status and Data Fields.
3.2.3 Status
The ‘Status’ byte provides feedback from the preceding read or program operation.
Status Bits
Setting
Comment
0,1
00 (MSB,LSB)
Transponder type: RO
01
Transponder type: R/W
10
Transponder type: MPT/SAMPT
11
Other
2
1/0
If set, Startbyte detected
3
1/0
If set, DBCC O.K.
4
1/0
If set, FBCC O.K.
5
1/0
If set, Micro-reader S/W version follows
(all other status bits are reset)
6 - 7
Reserved
