m24lr64-r STMicroelectronics, m24lr64-r Datasheet - Page 74

• Manufacturer Part Number: m24lr64-r
• Description: 64 Kbit Eeprom With Password Protection & Dual Interface 400 Khz I?c Serial Bus & Iso 15693 Rf Protocol At 13.56 Mhz
• Manufacturer: STMicroelectronics

Commands codes
26.1
74/126
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
to 8 when Bit 3 =
The request contains:
●
●
●
●
●
●
The M24LR64-R does not generate any answer in case of error.
Table 34.
The response contains:
●
●
Table 35.
During an Inventory process, if the VCD does not receive an RF M24LR64-R response, it
waits a time t
of the request EOF sent by the VCD.
●
●
where:
●
●
t
modulation mode.
NRT
Response
Request
SOF
SOF
the flags,
the Inventory command code (see
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
SOF
NRT
min = 4384/f
min = 4384/f
is the time required by the M24LR64-R to transmit an SOF to the VCD
is the nominal response time of the M24LR64-R
SOF
Request_flags Inventory
Response_
Inventory request format
Inventory response format
3
are dependent on the M24LR64-R-to-VCD data rate and subcarrier
before sending an EOF to switch to the next slot. t
8 bits
flags
8 bits
1.
C
C
(323.3µs) + t
(323.3µs) + t
DSFID
8 bits
01h
Doc ID 15170 Rev 9
SOF
NRT
Optional
Table 33: Command
8 bits
AFI
64 bits
UID
length
Mask
8 bits
codes)
0 - 64 bits
Mask
value
3
starts from the rising edge
Table 26: Request flags 5
3
3
CRC16
is:
16 bits
is:
CRC16
16 bits
M24LR64-R
Response
Request
EOF
EOF