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ST25DV64KC Scheda tecnica(PDF) 81 Page - STMicroelectronics

Il numero della parte ST25DV64KC
Spiegazioni elettronici  Dynamic NFC/RFID tag IC with 4-Kbit, 16-Kbit or 64-Kbit EEPROM, fast transfer mode capability and optimized I2C
PDF  203 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST25DV64KC Scheda tecnica(HTML) 81 Page - STMicroelectronics

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Table 97. Definition of request flags 1 to 4
Bit No
Flag
Level
Description
Bit 1
Subcarrier_flag (1)
0
A single subcarrier frequency is used by the ST25DVxxKC
1
Two subcarriers are used by the ST25DVxxKC
Bit 2
Data_rate_flag (2)
0
Low data rate is used
1
High data rate is used
Bit 3
Inventory_flag
0
The meaning of flags 5 to 8 is described in Table 98
1
The meaning of flags 5 to 8 is described in Table 99
Bit 4
Protocol_extension
_flag
0
No Protocol format extension
1
Protocol format extension. Reserved for future use.
1. Subcarrier_flag refers to the ST25DVxxKC-to-VCD communication.
2. Data_rate_flag refers to the ST25DVxxKC-to-VCD communication.
Table 98. Request flags 5 to 8 when inventory_flag, Bit 3 = 0
Bit nb
Flag
Level
Description
Bit 5
Select flag (1)
0
The request is executed by any ST25DVxxKC according to
the setting of Address_flag
1
The request is executed only by the ST25DVxxKC in Selected
state
Bit 6
Address flag
0
The request is not addressed. UID field is not present. The
request is executed by all ST25DVxxKCs.
1
The request is addressed. UID field is present. The request is
executed only by the ST25DVxxKC whose UID matches the
UID specified in the request.
Bit 7
Option flag
0
Option not activated.
1
Option activated.
Bit 8
RFU
0
-
1. If the Select_flag is set to 1, the Address_flag is set to 0 and the UID field is not present in the request.
Table 99. Request flags 5 to 8 when inventory_flag, Bit 3 = 1
Bit nb
Flag
Level
Description
Bit 5
AFI flag
0
AFI field is not present
1
AFI field is present
Bit 6
Nb_slots flag
0
16 slots
1
1 slot
Bit 7
Option flag
0
-
Bit 8
RFU
0
-
ST25DV04KC ST25DV16KC ST25DV64KC
RF protocol description
DS13519 - Rev 3
page 81/203



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