Mpt/Sampt Read Data Format - Texas Instruments 2000 Series Reference Manual

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4.2.3 MPT/SAMPT
START
PRE BITS
16
LSB
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
P P P P P P
Page 1
Page 2
. .
Page 16
Page 17
A 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.
SCBU027 – May 2000
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READ DATA
IDENTIFICATION DATA
64
8
128 bit
Figure 4-11. MPT/SAMPT Read Data Format
LSB
C C
| |
PAGE COMMAND
MSB LSB MSB LSB
000001 00 Read unlocked page
000010 01 Programming done
. 10 Read locked page
010000 11 Reserved (see Note A)
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
Transponder Responses
READ DISCHARGE
ADDR.
FBCC
DBCC
16 16
8
MSB
Transponder Protocols 31