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LRI1K 数据表(PDF) 71 Page - STMicroelectronics

部件名 LRI1K
功能描述  1024-bit EEPROM tag IC at 13.56 MHz, with 64-bit UID and kill code, ISO 15693 and ISO 18000-3 Mode 1 compliant
PDF  86 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

LRI1K 数据表(HTML) 71 Page - STMicroelectronics

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LRI1K
Commands codes
Doc ID 17170 Rev 3
71/86
20.19
Fast Inventory Initiated
Before receiving the Fast Inventory Initiated command, the LRI1K must have received an
Initiate or a Fast Initiate command in order to set the Initiate_ flag. If not, the LRI1K does not
answer to the Fast Inventory Initiated command.
On receiving the Fast Inventory Initiated request, the LRI1K runs the anticollision sequence.
The Inventory_flag must be set to 1. The Meaning of Flags 5 to 8 is shown in Table 13:
Request flags 5 to 8 when bit 3 = 1. The data rate of the response is multiplied by 2.
The request contains:
●
the flags,
●
the Inventory command code
●
the AFI option is not supported, AFI flag must be set to 0
●
the mask length
●
the mask value
●
the CRC
The LRI1K does not generate any answer if an error occurs.
The response contains:
●
The flags
●
the Unique ID
During an Inventory process, if the VCD does not receive an RF LRI1K response, it waits a
time t3 before sending an EOF to switch to the next slot. t3 starts from the rising edge of the
request EOF sent by the VCD.
●
If the VCD sends a 100% modulated EOF, the minimum value of t3 is:
t3min = 4384/fC (323.3 µs) + tSOF
●
If the VCD sends a 10% modulated EOF, the minimum value of t3 is:
t3min = 4384/fC (323.3 µs) + tNRT
where:
●
tSOF is the time required by the LRI1K to transmit an SOF to the VCD
●
tNRT is the nominal response time of the LRI1K
tNRT and tSOF are dependent on the LRI1K-to-VCD data rate and subcarrier modulation
mode.
Table 76.
Fast Inventory Initiated request format
Request
SOF
Request
Flags
Fast
Inventory
Initiated
IC Mfg
Code
Optiona
l AFI
Mask
length
Mask value
CRC16
Request
EOF
8 bits
C1h
02h
8 bits
8 bits
0 - 64 bits
16 bits
Table 77.
Fast Inventory Initiated response format
Response SOF Response Flags
DSFID
UID
CRC16
Response EOF
8 bits
00h
64 bits
16 bits



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