Micro-reader Module
25 July 1996
5.2.2 Read/Write Transponder
START
8
16
8
READ DATA
STOP
64
16
DISCHARGE
15
LSB
PRE BITS
END BITS
IDENTIFICATION DATA
DATA BCC
MSB
112 bits
16 bits
IDENT. DATA
Figure 14: R/W Read Data Format
5.2.3 MPT/SAMPT
START
8
16
8
16
READ DATA
ADDR.
READ
128 bit
64
16
LSB
IDENTIFICATION DATA
MSB
FBCC
DBCC
PRE BITS
DISCHARGE
Figure 15: MPT/SAMPT Read Data Format
The Read Address consists of a 2-bit status field and a 6-bit page field. The status field provides
information about the function the multipage transponder has executed and the page field shows
which page was affected.
READ ADDRESS
MSB
LSB
P P P P P P S S
|
|
PAGE
STATUS
MSB
LSB
MSB LSB
Page 1
000001 00
Read unlocked page
Page 2
000010
01
Programming done
. .
.
10
Read locked page
Page 16
010000
11 Reserved *)
Page 17
010001
000000
00
Read unlocked page, locking not correctly executed
000000
01
Programming done, but possibly not reliable
000000
10
Read locked page, but locking possibly not reliable
*) If the status indicates 'Reserved', the read data cannot be interpreted as identification data.
Note
:
It is strongly recommended to verify whether the requested function has actually been
carried out in the transponder by checking the Read Address
.
If a ‘not reliable’ response
message is received, the command must be sent again to guarantee transponder data
retention.
