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ST25DV64K Scheda tecnica(PDF) 112 Page - STMicroelectronics

Il numero della parte ST25DV64K
Spiegazioni elettronici  Dynamic NFC/RFID tag IC with 4-Kbit, 16-Kbit or 64-Kbit EEPROM,and fast transfer mode capability
PDF  220 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST25DV64K Scheda tecnica(HTML) 112 Page - STMicroelectronics

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RF operations
ST25DV04K ST25DV16K ST25DV64K
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DocID027603 Rev 4
During an Inventory process, if the VCD does not receive an RF ST25DVxxx response, it
waits for 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 + t2min
where:
•
tSOF is the time required by the ST25DVxxx to transmit an SOF to the VCD,
•
tNRT is the nominal response time of the ST25DVxxx.
tNRT and tSOF are dependent on the ST25DVxxx-to-VCD data rate and subcarrier
modulation mode.
Note:
In case of error, no response is sent by ST25DVxxx.
7.6.5
Stay Quiet
On receiving the Stay Quiet command, the ST25DVxxx enters the Quiet state if no error
occurs, and does NOT send back a response. There is NO response to the Stay Quiet
command even if an error occurs.
The Option_flag is not supported. The Inventory_flag must be set to 0.
When in the Quiet state:
•
the ST25DVxxx does not process any request if the Inventory_flag is set,
•
the ST25DVxxx processes any Addressed request.
The ST25DVxxx exits the Quiet state when:
•
it is reset (power off),
•
receiving a Select request. It then goes to the Selected state,
•
receiving a Reset to Ready request. It then goes to the Ready state.
The Stay Quiet command must always be executed in Addressed mode (Select_flag is reset
to 0 and Address_flag is set to 1).
Table 67. Stay Quiet request format
Request
SOF
Request flags
Stay Quiet
UID
CRC16
Request
EOF
-
8 bits
02h
64 bits
16 bits
-



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