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LRI2K 数据表(PDF) 47 Page - STMicroelectronics

部件名 LRI2K
功能描述  13.56 MHz, 2048-bit EEPROM tag IC with 64-bit UID and kill code, ISO 15693 and ISO 18000-3 Mode 1 compliant
PDF  89 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

LRI2K 数据表(HTML) 47 Page - STMicroelectronics

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LRI2K
Commands codes
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20.1
Inventory
When receiving the Inventory request, the LRI2K runs the anti-collision sequence. The
Inventory_flag is 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 request contains:
the flags,
the Inventory command code (see Table 20: Command codes)
the AFI if the AFI flag is set
the Mask Length
the Mask Value
the CRC
The LRI2K does not generate any answer in case of error.
The response contains:
the flags
the Unique ID
During an Inventory process, if the VCD does not receive an RF LRI2K 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 (323.3µs) + tSOF
If the VCD sends a 10% modulated EOF, the minimum value of t3 is:
t3min = 4384/fC (323.3µs) + tNRT
where:
tSOF is the time required by the LRI2K to transmit an SOF to the VCD
tNRT is the nominal response time of the LRI2K
tNRT and tSOF are dependent on the LRI2K-to-VCD data rate and subcarrier modulation
mode.
Table 21.
Inventory request format
Request
SOF
Request
flags
Inventory
Optional
AFI
Mask
length
Mask value
CRC16
Request
EOF
8 bits
01h
8 bits
8 bits
0 - 64 bits
16 bits
Table 22.
Inventory response format
Response
SOF
Response
flags
DSFID
UID
CRC16
Response
EOF
8 bits
8 bits
64 bits
16 bits



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