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M24LR64-R 数据表(PDF) 75 Page - STMicroelectronics

部件名 M24LR64-R
功能描述  64 Kbit EEPROM with password protection & dual interface: 400 kHz I²C serial bus & ISO 15693 RF protocol at 13.56 MHz
PDF  128 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

M24LR64-R 数据表(HTML) 75 Page - STMicroelectronics

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M24LR64-R
Commands codes
Doc ID 15170 Rev 14
75/128
26.1
Inventory
When receiving the Inventory request, the M24LR64-R runs the anticollision sequence. The
Inventory_flag is set to 1. The meaning of flags 5 to 8 is shown in Table 26: Request flags 5
to 8 when Bit 3 = 1.
The request contains:
●
the flags,
●
the Inventory command code (see Table 33: Command codes)
●
the AFI if the AFI flag is set
●
the mask length
●
the mask value
●
the CRC
The M24LR64-R 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 M24LR64-R 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 M24LR64-R to transmit an SOF to the VCD
●
tNRT is the nominal response time of the M24LR64-R
tNRT and tSOF are dependent on the M24LR64-R-to-VCD data rate and subcarrier
modulation mode.
Table 34.
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 35.
Inventory response format
Response
SOF
Response_
flags
DSFID
UID
CRC16
Response
EOF
8 bits
8 bits
64 bits
16 bits



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