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ST25DV04K 데이터시트(PDF) 46 Page - STMicroelectronics

부품명 ST25DV04K
상세설명  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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제조업체  STMICROELECTRONICS [STMicroelectronics]
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ST25DV04K 데이터시트(HTML) 46 Page - STMicroelectronics

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5.4.2
RF management feature description
RF_MNGT Register is used to control the RF communication between ST25DVxxx and a RF reader.
At boot time, and each time RF_MNGT register it is updated, content of RF_MNGT_Dyn register is copied
from RF_MNGT register. The content of RF_MNGT_Dyn register is used during application to set ST25DVxxx
behavior.
Content of this dynamic register RF_MNGT_Dyn can be updated on the fly, to temporarily modify the behavior of
ST25DVxxx without affecting the static value of RF_MNGT which will be recovered at next POR.
RF_MNGT register is composed of two bits (see Table 42. RF_MNGT_Dyn): RF_DISABLE and RF_SLEEP
For a normal usage of RF interface, bits RF_SLEEP and RF_DISABLE must be set to 0.
For RF are offered three modes:
•
RF sleep mode:
–
When RF_SLEEP is set to 1, all RF communications are disabled, RF interface doesn’t interpret
commands, but minimizes consumption of RF interface.
•
RF disable mode:
–
When RF_SLEEP is set to 0 and RF_DISABLE is set to 1, RF commands are interpreted but not
executed. In case of a valid command, ST25DVxxx will respond after t1 with the error code 0Fh. The
Inventory command is not answered.
•
RF normal mode:
–
In normal usage, RF_SLEEP and RF_DISABLE are set to 0, ST25DVxxx will process the request and
respond accordingly when I2C is not accessing ST25DVxxx. If I2C is busy, ST25DV will respond to RF
request with the error code 0Fh.
ST25DV04K ST25DV16K ST25DV64K
RF management feature
DS10925 - Rev 9
page 46/200



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