lri2k STMicroelectronics, lri2k Datasheet - Page 74

• Manufacturer Part Number: lri2k
• Description: 13.56 Mhz, 2048-bit Eeprom Tag Ic With 64-bit Uid And Kill Code, Iso 15693 And Iso 18000-3 Mode 1 Compliant
• Manufacturer: STMicroelectronics

Commands codes
20.22
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Inventory Initiated
Before receiving the Inventory Initiated command, the LRI2K must have received an Initiate
or a Fast Initiate command in order to set the Initiate_ flag. If not, the LRI2K does not answer
to the Inventory Initiated command.
On receiving the Inventory Initiated request, the LRI2K runs the anticollision sequence. The
Inventory_flag must be set to 1. The Meaning of Flags 5 to 8 is given in
flags 5 to 8 when bit 3 =
The request contains:
The LRI2K does not generate any answer if an error occurs.
Table 84.
The response contains:
Table 85.
During an Inventory process, if the VCD does not receive an RF LRI2K response, it waits a
time t
request EOF sent by the VCD.
where:
t
mode.
NRT
Request
Response
SOF
SOF
the flags,
the Inventory Command code
the AFI if the AFI flag is set
the Mask Length
the Mask Value
the CRC
the flags
the Unique ID
If the VCD sends a 100% modulated EOF, the minimum value of t
t
If the VCD sends a 10% modulated EOF, the minimum value of t
t
t
t
and t
3
3
3
SOF
NRT
min = 4384/f
min = 4384/f
before sending an EOF to switch to the next slot. t
is the time required by the LRI2K to transmit an SOF to the VCD
is the nominal response time of the LRI2K
SOF
Request
Flags
8 bits
Response
Inventory Initiated request format
Inventory Initiated response format
are dependent on the LRI2K-to-VCD data rate and subcarrier modulation
Flags
8 bits
C
C
Inventory
(323.3 µs) + t
(323.3 µs) + t
Initiated
D1h
1.
DSFID
00h
IC Mfg
code
02h
SOF
NRT
Optiona
8 bits
l AFI
64 bits
UID
length
Mask
8 bits
3
starts from the rising edge of the
Mask value
0 - 64 bits
3
CRC16
3
16 bits
is:
Table 13: Request
is:
CRC16
16 bits
Response
Request
EOF
EOF
LRI2K