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ST25DV04K Folha de dados(PDF) 46 Page - STMicroelectronics

Nome de Peças ST25DV04K
Descrição Electrónicos  Dynamic NFC/RFID tag IC with 4-, 16-, or 64-Kbit EEPROM, and fast transfer mode capability
PDF  197 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
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ST25DV04K Folha de dados(HTML) 46 Page - STMicroelectronics

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5.6
Data Protection
ST25DVxxx provides a special data protection mechanism based on passwords that unlock security sessions.
User memory can be protected for read and/or write access and system configuration can be protected from write
access, both from RF and I2C assess.
5.6.1
Data protection registers
Table 43. RFA1SS access
RF
I2C
Command
Type
Address
Type
Read Configuration (cmd code A0h) @04h
Write Configuration (cmd code A1h) @04h
R always, W if RF configuration security
session is open and configuration not
locked
E2 = 1, 0004h
R always, W if I2C security
session is open
Table 44. RFA1SS
Bit
Name
Function
Factory Value
b1-b0
PWD_CTRL_A1
00: Area 1 RF user security session can’t be open by password
01: Area 1 RF user security session is open by RF_PWD_1
10: Area 1 RF user security session is open by RF_PWD_2
11: Area 1 RF user security session is open by RF_PWD_3
00b
b3-b2
RW_PROTECTION_A1
00: Area 1 RF access: Read always allowed / Write always allowed
01: Area 1 RF access: Read always allowed, Write allowed if RF user security
session is open
10: Area 1 RF access: Read always allowed, Write allowed if RF user security
session is open
11: Area 1 RF access: Read always allowed, Write always forbidden
00b
b7-b4
RFU
-
0000b
Note:
Refer to Table 11. System configuration memory map for the RFA1SS register.
Table 45. RFA2SS access
RF
I2C
Command
Type
Address
Type
Read Configuration (cmd code A0h) @06h
Write Configuration (cmd code A1h) @06h
R always, W if RF configuration security
session is open and configuration not
locked
E2 = 1, 0006h
R always, W if I2C security
session is open
ST25DV04K ST25DV16K ST25DV64K
Data Protection
DS10925 - Rev 11
page 46/197



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