ST25DV04K datasheet(36/220 Pages) STMICROELECTRONICS

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ST25DVxxx specific features

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ST25DVxxx specific features

ST25DVxxx offers the following features:

•

A fast transfer mode (FTM), to achieve a fast link between RF and contact worlds, via a

256 byte buffer called Mailbox. This mailbox dynamic buffer of 256 byte can be filled or

emptied via either RF or I2C.

•

A GPO pin, which indicates incoming event to the contact side, like RF Field changes,

RF activity in progress, RF writing completion or Mailbox message availability.

•

An Energy Harvesting element to deliver µW of power when external conditions make it

possible.

•

RF management, which allows ST25DVxxx to ignore RF requests.

All these features can be programmed by setting static and/or dynamic registers of the

ST25DVxxx. ST25DVxxx can be partially customized using configuration registers located

in the E2 system area.

These registers are:

•

dedicated to Data Memory organization and protection ENDAi, I2CSS, RFAiSS,

LOCK_CCFILE.

•

dedicated to fast transfer mode MB_WDG, MB_MODE

•

dedicated to observation, GPO, IT_TIME

•

dedicated to RF , RF_MNGT, EH_MODE

•

dedicated the device’s structure LOCK_CFG

A set of additional registers allows to identify and customize the product (DSFID, AFI,

IC_REF, etc.).

In I²C,

Read accesses to the static configuration register is always allowed, except for passwords.

For dedicated registers, write access is granted after prior successful presentation of the I2C

password. Configuration register are located from @00h to 0Fh in the system area (device

code 111)

In RF

Dedicated commands Read Configuration and Write Configuration must be used to access

the static configuration registers. Update is only possible when the access right was granted

by presenting the RF configuration password (RF_PWD_0), and if the system

configuration was not previously locked by the I2C host (LOCK_CFG=1), which acts as

security master.

After any valid write access to the static configuration registers, the new configuration is

immediately applied.

Some of the static registers have a dynamic image (notice _Dyn) preset with the static

When it exists, ST25DVxxx uses the dynamic configuration register to manage its

processes. A dynamic configuration register updated by the application will recover its

default static value after a Power On Reset (POR).

ST25DV04K Datasheet(PDF) 36 Page - STMicroelectronics

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