m24lr64-r STMicroelectronics, m24lr64-r Datasheet - Page 104

• 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
26.18
104/126
Fast Inventory Initiated
Before receiving the Fast Inventory Initiated command, the M24LR64-R must have received
an Initiate or a Fast Initiate command in order to set the Initiate_ flag. If not, the M24LR64-R
does not answer to the Fast Inventory Initiated command.
On receiving the Fast Inventory Initiated request, the M24LR64-R runs the anticollision
sequence. The Inventory_flag must be set to 1. The meaning of flags 5 to 8 is shown in
Table 26: Request flags 5 to 8 when Bit 3 =
2.
The request contains:
●
●
●
●
●
●
The M24LR64-R does not generate any answer in case of error.
Table 87.
The Response contains:
●
●
Table 88.
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:
●
●
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
3
3
SOF
NRT
min = 4384/f
min = 4384/f
Request
is the time required by the M24LR64-R to transmit an SOF to the VCD
is the nominal response time of the M24LR64-R
_flags
8 bits
Response
Fast Inventory Initiated request format
Fast Inventory Initiated response format
3
before sending an EOF to switch to the next slot. t
_flags
8 bits
Inventory
C
C
Initiated
Fast
(323.3µs) + t
(323.3µs) + t
C1h
DSFID
8 bits
IC Mfg
code
02h
Doc ID 15170 Rev 9
SOF
NRT
Optional
8 bits
AFI
1. The data rate of the response is multiplied by
length
Mask
8 bits
64 bits
UID
Mask value
0 - 64 bits
3
starts from the rising edge
3
CRC16
3
16 bits
is:
is:
CRC16
16 bits
M24LR64-R
Response
Request
EOF
EOF