ST25DV04K datasheet(19/200 Pages) STMICROELECTRONICS

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4.4

Dynamic configuration

ST25DV has a set of dynamic registers that allow temporary modification of its behavior or report on its activity.

Dynamic registers are volatile and not restored to their previous values after POR.

Some static registers have an image in dynamic registers: dynamic register value is initialized with the static

of Energy Harvesting). When a valid change occurs in a static register, in RF or I2C, the corresponding dynamic

Other, dynamic registers, automatically updated, contain indication on ST25DV activity. (i.e.: IT_STS_Dyn gives

the interruption’s status or MB_CTRL_Dyn gives the fast transfer mode mailbox control).

In RF, dynamic registers can be accessed via dedicated (Fast) Read Dynamic Configuration and (Fast) Write

Dynamic Configuration commands, with a pointer acting as the register address. No password is needed to

access dynamic registers.

In I2C, dynamic registers can be accessed with I2C read and write commands with device select E2=0. Dynamic

registers can be read in continuity. Dynamic registers and fast transfer mode mailbox can be read in continuity,

but not written in continuity. No password is needed to access dynamic registers.

Table 12. Dynamic registers memory map shows the complete map of dynamic registers, as seen by RF interface

and by I2C interface.

Table 12. Dynamic registers memory map

RF access

Dynamic Registers

I2C access

Address

Type

Name

Function

Device

select

Address

Type

00h

GPO_CTRL_Dyn

GPO control

E2 = 0

2000h

R/W

No access

ST Reserved

E2 = 0

2001h

02h

R/W

EH_CTRL_Dyn

Energy Harvesting management & usage status

E2 = 0

2002h

R/W

No access

RF_MNGT_Dyn

RF interface usage management

E2 = 0

2003h

R/W

I2C_SSO_Dyn

I2C security session status

E2 = 0

2004h

IT_STS_Dyn

Interruptions Status

E2 = 0

2005h

0Dh

R/W

MB_CTRL_Dyn

Fast transfer mode control and status

E2 = 0

2006h

R/W

MB_LEN_Dyn

length of fast transfer mode message

E2 = 0

2007h

ST25DV04K ST25DV16K ST25DV64K

Dynamic configuration

DS10925 - Rev 9

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