ST25DV64K datasheet(17/200 Pages) STMICROELECTRONICS

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4.3

System configuration area

In addition to EEPROM user memory, ST25DVxxx includes a set of static registers located in the system

configuration area memory (EEPROM nonvolatile registers). Those registers are set during device configuration

(i.e.: area extension), or by the application (i.e.: area protection). Static registers content is read during the boot

sequence and define basic ST25DVxxx behavior.

In RF, the static registers located in the system configuration area can be accessed via dedicated Read

Configuration and Write Configuration commands, with a pointer acting as the register address.

The RF configuration security session must first be open, by presenting a valid RF configuration password, to

grant write access to system configuration registers.

The system configuration area write access by RF can also be deactivated by I2C host.

In I2C static registers located in the system configuration area can be accessed with I2C read and write

commands with device select E2=1. Readable system areas could be read in continuity.

I2C security session must first be open, by presenting a valid I2C password, to grant write access to system

configuration registers.

Table 11. System configuration memory map shows the complete map of the system configuration area, as seen

by RF and I2C interface.

Table 11. System configuration memory map

RF access

Static Register

I2C access

Address

Type

Name

Function

Device select

Address

Type

00h

RW (1)

GPO

Enable/disable ITs on GPO

E2=1

0000h

RW (2)

01h

RW(1)

IT_TIME

Interruption pulse duration

E2=1

0001h

RW(2)

02h

RW(1)

EH_MODE

Energy Harvesting default strategy after Power ON

E2=1

0002h

RW(2)

03h

RW(1)

RF_MNGT

RF interface state after Power ON

E2=1

0003h

RW(2)

04h

RW(1)

RFA1SS

Area1 RF access protection

E2=1

0004h

RW(2)

05h

RW(1)

ENDA1

Area 1 ending point

E2=1

0005h

RW(2)

06h

RW(1)

RFA2SS

Area2 RF access protection

E2=1

0006h

RW(2)

07h

RW(1)

ENDA2

Area 2 ending point

E2=1

0007h

RW(2)

08h

RW(1)

RFA3SS

Area3 RF access protection

E2=1

0008h

RW(2)

09h

RW(1)

ENDA3

Area 3 ending point

E2=1

0009h

RW(2)

0Ah

RW(1)

RFA4SS

Area4 RF access protection

E2=1

000Ah

RW(2)

No access

I2CSS

Area 1 to 4 I2C access protection

E2=1

000Bh

RW(2)

N/A

RW (3) (4) LOCK_CCFILE Blocks 0 and 1 RF Write protection

E2=1

000Ch

RW(2)

0Dh

RW(1)

MB_MODE

Fast transfer mode state after power ON

E2=1

000Dh

RW(2)

0Eh

RW(1)

MB_WDG

Maximum time before the message is automatically

released

E2=1

000Eh

RW(2)

0Fh

RW(1)

LOCK_CFG

Protect RF Write to system configuration registers

E2=1

000Fh

RW(2)

N/A

WO (5)

LOCK_DSFID DSFID lock status

E2=1

0010h

WO (6)

LOCK_AFI

AFI lock status

E2=1

0011h

N/A

RW(5)

DSFID

DSFID value

E2=1

0012h

N/A

RW(6)

AFI

AFI value

E2=1

0013h

N/A

MEM_SIZE

Memory size value in blocks, 2 bytes

E2=1

0014h to 0015h

BLK_SIZE

Block size value in bytes

E2=1

0016h

N/A

IC_REF

IC reference value

E2=1

0017h

ST25DV04K ST25DV16K ST25DV64K

System configuration area

DS10925 - Rev 9

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