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ST25DV04K Folha de dados(PDF) 9 Page - STMicroelectronics

Nome de Peças ST25DV04K
Descrição Electrónicos  Dynamic NFC/RFID tag IC with 4-, 16-, or 64-Kbit EEPROM, and fast transfer mode capability
PDF  197 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST25DV04K Folha de dados(HTML) 9 Page - STMicroelectronics

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3.2
Contactless interface
Device set in RF mode
To ensure a proper boot of the RF circuitry, the RF field must be turned on without any modulation for a minimum
period of time tBootRF. Before this time, the device ignores all received RF commands (see Figure 6).
Device reset in RF mode
To ensure a proper reset of the RF circuitry, the RF field must be turned off (100% modulation) for a minimum
period of time (tRF_OFF).
The RF access can be temporarily or indefinitely disabled by setting the appropriate value in the RF_MNGT or
RF_MNGT_Dyn registers.
Figure 6. RF power-up sequence (no DC supply)
RF interface ready
Power-up by RF
(no VCC ; VDCG)
GPO CMOS version
RF field
Vint_supply
tBootRF
GPO = RF_ACTIVITY
GPO = FIELD CHANGE
REQ
EOF
ANS
EOF
GPO = FIELD CHANGE AND RF_ACTIVITY
RF REQUEST
RF ANSWER
No access
allowed
RF or I2C
tminCD
No answer to RF
request, if any
IT duration
ST25DV04K ST25DV16K ST25DV64K
Contactless interface
DS10925 - Rev 11
page 9/197



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