ST25DV04KC datasheet(10/203 Pages) STMICROELECTRONICS

Part #	ST25DV04KC

Description	Dynamic NFC/RFID tag IC with 4-Kbit, 16-Kbit or 64-Kbit EEPROM, fast transfer mode capability and optimized I2C

PDF	203 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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10 / 203 page

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, ST25DVxxKC ignores all received RF commands. (See

Figure 8. ST25DVxxKC 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

Figure 8. ST25DVxxKC RF power-up sequence (No DC supply)

RF interface ready

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

Power-up by RF

(No VCC;

Pull-up on GPO)

GPO open drain version

ST25DV04KC ST25DV16KC ST25DV64KC

Contactless interface

DS13519 - Rev 3

page 10/203

ST25DV04KC Datasheet(PDF) 10 Page - STMicroelectronics