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ST25DV16K Scheda tecnica(PDF) 9 Page - STMicroelectronics

Il numero della parte ST25DV16K
Spiegazioni elettronici  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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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST25DV16K Scheda tecnica(HTML) 9 Page - STMicroelectronics

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Power-down mode
During power-down (continuous decay of VCC), the device must be in Standby power mode (mode reached after
decoding a Stop condition, assuming that there is no internal write cycle in progress).
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 tRF_ON. Before this time, ST25DVxxx will ignore all received RF commands. (See
Figure 6. ST25DVxxx RF power-up sequence (No DC supply)).
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
tRF_OFF period of time.
The RF access can be temporarily or indefinitely disabled by setting the appropriate value in the RF disable
register.
Figure 6. ST25DVxxx RF power-up sequence (No DC supply)
RF interface ready
Power-Up by RF
(No Vcc ; VDCG )
GPO CMOS Version
RFfield
Vint_supply
tboot
GPO = RF_ACTIVITY
GPO = FIELD CHANGE
REQ
EOF
ANS
EOF
GPO = FIELD CHANGE AND RF_ACTIVITY
RF REQUEST
RF ANSWER
None Access
Allowed
RF or I2C
tminCD
No answer to RF
Request if any
IT duration
ST25DV04K ST25DV16K ST25DV64K
Contactless interface
DS10925 - Rev 9
page 9/200



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