ST25DV64K datasheet(64/220 Pages) STMICROELECTRONICS

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ST25DVxxx specific features

ST25DV04K ST25DV16K ST25DV64K

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DocID027603 Rev 4

At boot time, and each time RF_MNGT register it is updated, content of RF_MNGT_Dyn

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 27: 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, ST25DV will respond

after t1 with the error code 0Fh. Inventory and Stay Quiet commands are 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.

Whatever RF_MNGT register value, the Field detection remains available leaving to master

the possibility to temporarily open RF communication by overwriting value in

RF_MNGT_Dyn dynamic register.

ST25DV64K 数据表(PDF) 64 Page - STMicroelectronics

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