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ST25DV04K Datenblatt(PDF) 78 Page - STMicroelectronics

Teilenummer ST25DV04K
Bauteilbeschribung  Dynamic NFC/RFID tag IC with 4-Kbit, 16-Kbit or 64-Kbit EEPROM, and fast transfer mode capability
PDF  200 Pages
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST25DV04K Datenblatt(HTML) 78 Page - STMicroelectronics

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Table 94. 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 ST25DVxxx
1
Two subcarriers are used by the ST25DVxxx
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 95. Request
flags 5 to 8 when inventory_flag, Bit 3 = 0
1
The meaning of flags 5 to 8 is described in Table 96. Request
flags 5 to 8 when inventory_flag, Bit 3 = 1
Bit 4
Protocol_extension
_flag
0
No Protocol format extension
1
Protocol format extension. Reserved for future use.
1. Subcarrier_flag refers to the ST25DVxxx-to-VCD communication.
2. Data_rate_flag refers to the ST25DVxxx-to-VCD communication.
Table 95. 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 ST25DVxxx according to the
setting of Address_flag
1
The request is executed only by the ST25DVxxx in Selected
state
Bit 6
Address flag
0
The request is not addressed. UID field is not present. The
request is executed by all ST25DVxxxs.
1
The request is addressed. UID field is present. The request
is executed only by the ST25DVxxx 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 96. 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
-
ST25DV04K ST25DV16K ST25DV64K
RF protocol description
DS10925 - Rev 9
page 78/200



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