ST25DV04K datasheet(53/197 Pages) STMICROELECTRONICS

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Table 66. RF_PWD_3

Bit

Name

Function

Factory Value

b7-b0

RF_PWD_3

Byte 0 (LSB) of password 3for RF user security session

00h

Byte 1 of password 3 for RF user security session

00h

Byte 2 of password 3 for RF user security session

00h

Byte 3 of password 3 for RF user security session

00h

Byte 4 of password 3 for RF user security session

00h

Byte 5 of password 3 for RF user security session

00h

Byte 6 of password 3 for RF user security session

00h

Byte 7 (MSB) of password 3 for RF user security session

00h

Note:

Refer to Table 11. System configuration memory map for the RF_PWD_3 register.

Table 67. I2C_SSO_Dyn access

I2C

Command

Type

Address

Type

No access

E2 = 0, 2004h

Table 68. I2C_SSO_Dyn

Bit

Name

Function

Factory Value

b7-b1

RFU

I2C_SSO

0: I2C security session close

1: I2C security session open

(Set or reset via I2C Present password command)

Note:

Refer to Table 12. Dynamic registers memory map for the I2C_SSO_Dyn register.

5.6.2

Passwords and security sessions

ST25DVxxx provides protection of user memory and system configuration static registers. RF user and I2C host

can access those protected data by opening security sessions with the help of passwords. Access rights is more

restricted when security sessions are closed, and less restricted when security sessions are open.

Dynamic registers and fast transfer mode mailbox are not protected by any security session.

There is three type of security sessions, as shown in Table 69. Security session type:

ST25DV04K ST25DV16K ST25DV64K

Data Protection

DS10925 - Rev 11

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