ST25DV64K datasheet(9/200 Pages) STMICROELECTRONICS

部件名	ST25DV64K

功能描述	Dynamic NFC/RFID tag IC with 4-Kbit, 16-Kbit or 64-Kbit EEPROM, and fast transfer mode capability

PDF	200 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

9 / 200 page

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

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

ST25DV64K 数据表(PDF) 9 Page - STMicroelectronics

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