ST25DV04K datasheet(31/220 Pages) STMICROELECTRONICS

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ST25DV04K ST25DV16K ST25DV64K

Memory management

219

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.

Table 6. ENDA2(1)

Command

Read Configuration (cmd code A0h) @07h

Write Configuration (cmd code A1h) @07h

Type

R always, W if RF configuration security session is open and configuration not

locked

I2C

Address

E2 = 1, 0007h

Type

R always, W if I2C security session is open

Bit

Name

Function

Factory Value

b7-b0

ENDA2

End Area 2 = 8 x ENDA2 + 7 when expressed in blocks (RF)

End Area 2 = 32*ENDA2 + 31 when expressed in bytes (I2C)

ST25DV04K-XX: 0Fh

ST25DV16K-XX: 3Fh

ST25DV64K-XX: FFh

1. Refer to Table 8: System configuration memory map for the ENDA2 register.

Table 7. ENDA3(1)

Command Read Configuration (cmd code A0h) @09h

Write Configuration (cmd code A1h) @09h

Type

R always, W if RF configuration security session is open and configuration not

locked

I2C

Address

E2 = 1, 0009h

Type

R always, W if I2C security session is open

Bit

Name

Function

Factory Value

b7-b0

ENDA3

End Area 3 = 8 x ENDA3 + 7 when expressed in blocks (RF)

End Area 3 = 32 x ENDA3 + 31 when expressed in bytes (I2C)

ST25DV04K-XX: 0Fh

ST25DV16K-XX: 3Fh

ST25DV64K-XX: FFh

1. Refer to Table 8: System configuration memory map for the ENDA3 register.

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